Doing your own electrical work is dangerous as well as illegal in some cases. – Examples in British and SI System. Don't fancy doing this project yourself? The mains double pole isolating switch is clipped into place along the DIN bar using separate teeth of the bus bar. So please! RCDs can also be switched off manually and can take the place of the isolator switch in the consumer unit, if they break live and neutral. Traditionally in TT installations, either a non-metallic consumer unit was fitted or, if a metal consumer unit was installed, a separate ‘front-end’ RCD was installed before the metal consumer unit. Thousands of products. These still comply with the latest wiring regulations (17th edition) so you could still use it if you wanted to. Compare. A dual RCD (residual current device) consumer Unit offers the ability to split load the power over two sets of circuits, RCD1 and RCD2. There have been some really sweeping changes in the Electrical Safety Standards for the Private Rental Sector recently. How to Wire 277V & 480V, 1-Phase & 3-Phase, Commercial Main Service Panel? As they are very sensitive, it is not practical to fit one RCD to protect the whole house. The image below shows two MCBs and the bus bar. This is a cost effective solution in case of power failure as all the load points won’t shut at once. RCDs have a test button which creates an earth leak with a resistor, and it is usually recommended that they are tested once a month. all the load circuits should be connected to the 230V AC supply via three wires i.e. There are two additional and separate Neutral terminals (named as Neutral 1 for RCD#1 & Neutral 2 for RCD#2) assigned to each RCD’s. The use of RCDs is necessary, on two occasions, to meet the wiring regulations. This dual RCD’s configuration will provide full earth leakage protection to appliances connected to the two sets of MCB banks. Dual Rcd Consumer Unit Wiring Diagram– wiring diagram is a simplified adequate pictorial representation of an electrical circuit. – RCD+MCB, Wiring a 1-Φ, 230V Dual Split Load Consumer Unit & Distribution Board : IEC, EU & UK, Dual split load consumer unit contains a main switch breaker and two RCD’s to control two separate load points. This generally applies to higher Amp rated appliances (showers, cookers etc) but it should always be checked with an electrician as to which circuits need to be placed on the RCD side of the consumer unit. The modern consumer unit is the centre, or heart, of the wiring system in the home. if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-diydoctor_org_uk-under_second_paragraph-0')};Please also see our project on the New Wiring and Cable Colours. Finally, the load points such as light bulbs, ceiling fan and socket outlet, washing machine, water heaters, electric motors etc. Dual split load consumer unit contains a main switch breaker and two RCD’s to control two separate load points. This remains one of the most popular fuse board types because it is far cheaper than its alternatives. To do this, you need to open the unit and flip the appropriate trip switch to off or for a fuse box you need to remove the fuse to isolate the electricity. This allows protection in full for all individual circuits and if one trips, all others will still work. A consumer unit can use an RCD as the main switch. Delivery 7 days a week. Your email address will not be published. Can i soft wire the new RCBO in the consumer unit from the live side of the main RCD. In a single phase 230V consumer unit and distribution board. The VML933H from Hager's 'Design 10' range, is a 6 Way Consumer Unit.Offering 6 usable ways, isolated by 63amp main switch and protected by 2 x 80amp RCD. A: A Fuse Box (also called a consumer unit) is designed to distribute electricity around a building and protect electrical circuits from surges in current by breaking the circuit if and when a surge occurs. Instructions on wiring a consumer unit to UK specifications for dual RCD and RCBO consumer units. A smaller white lead is a functional earth connection. It shows the components of the circuit as simplified shapes, and the capacity and signal friends together with the devices. The consumer unit is required to have a minimum IP rating to prevent a person from touching live parts and to prevent conductive or combustible materials from falling into the consumer unit. In this case it is a 2.5mm cable for the ring main. Your client is not a qualified electrician. At least once a day the RCCB will trip. Warning: To complete electrical works you must comply with Electrical Regulations. UK & IEC Wiring Color Codes for 230V, 1-Phase, 2-Wire System. How to Wire 208V & 120V, 1-Phase & 3-Phase Main Panel? I'd like to keep this new circuit off of the main RCD as i dont want to be responsile for freezers going off etc if the new circuit trips (hot tub in garden). Do not attempt removal or replacement unless you are you are qualified to Part P regulation standards. do as the surge device may trip the RCD if it had a fault and that is a real pain and there is also the chance of risk to human life with leakage currents from the surge device on the wrong side of the RCD. A far better option is individual RCBOs for each circuit - combined circuit breakers and RCDs. Finally, the load points such as light bulbs, The earth busbar terminal in the CU is connected to the main, Good to know:  RCD protection is a must in the consumer unit according to the IEC and 17th edition. Basically do it properly of dont bother Consumer units (CU) are replaced for various reasons. The following fig shows how to connect single phase 230V load circuits in dual split load CU. Never stand or touch wet and metal parts while repairing or installation. Click here for more information. This protects all areas including showers and cookers, but if one trips the other will ensure at least some lights and some sockets still work. ... • Dual RCD consumer unit, pre-fitted with Type 2 SPD, to provide surge protection for domestic installations • Providing up to 9 useable ways: Type 1 - Pre-assembled Consumer Unit: Part No. 100A Mains Switch; 2 x 63A 30mA RCDs; 8 x MCBs (3 x 6A, 1 x 16A, 3 x 32A & 1 x 40A) £67.99. Live connected to MCB with neutral going to RCD neutral terminal block, For regulations governing heights of sockets etc, please click here, Electrical Wiring Domestic book Available from Amazon, Wiring and Lighting Book Available from Amazon. Dont run a whole new garage consumer unit from the 32a ring main in the house. Main double pole isolation switch on din bar with live and neutral coming into the main double pole switch from the meter and earth terminal block. There is an additional. Keep in mind that proper wiring is needed in case of RCD breaker. The following fig shows the wiring of dual split load consumer units according to Old UK wiring color codes. Our website is made possible by displaying online advertisements to our visitors. Unlike with dual RCD consumer units, where you lose power to 50% of the circuits. Before migrating to the IEC, the UK color codes for single phase 230V were Red for “Phase”, Black for “Neutral” and Green for “Earth/Ground) wire. In the example above, each RCD covers three circuits so a L-E or N-E fault will cause three circuits to be disconnected. They simply push on via a spring loaded lock at their back. IEC, UK & EU, Wiring of the Distribution Board with RCD, Wiring of the Distribution Board without RCD, differences between MCB, MCCB, ELCB & RCB, RCD or RCCB/RCBO Circuit Breakers, Single Phase Electrical Wiring Installation in Home – NEC & IEC, Three Phase Electrical Wiring Installation in Home – NEC & IEC, Single-Phase Electrical Wiring installation in a Multi-Story Building, 3-Phase & 1-Phase Electrical Distribution Wiring Installation in Multistory Building. Dual RCD consumer units are a cheaper economy option, the disadvantage being that a fault on one circuit can affect several others. How to Wire a Dual Split Load Consumer Unit? Keep in mind that never ever connect all the lighting points to the same RCD as you will face total darkness in case an earth leakage fault occurs on that associated RCD. Chint NX3 16-Module 8-Way Populated High Integrity Dual RCD Consumer Unit (1245V) Product rating 4.5 out of 5 stars Compare. Before a consumer unit can be replaced, it needs to isolated. In the image below, we show the earth cable from the meter (L). Read carefully all the cautions and instructions and follow them strictly while doing this tutorial or any other work in practical related to electrical works. Contact the licensed electrician or the. Step by Step Procedure with Calculation & Diagrams. This way, the protection to the load points are as follows. The two wires from the energy meter enter the consumer unit and connect to the double pole MCB as the main switch. Get Free Android App | Download Electrical Technology App Now! RCD’s also work by detecting an imbalance between the Live and the Neutral conductors and this feature is a requirement for all Class 2 double insulated equipment. This will protect all circuits but if the RCD trips, so do all circuits. Check the Fire alarm installation guide here.. Let us help you find a tradesman local to you. The author will not be liable for any losses, injuries, or damages from the display or use of this information or if you try any circuit in wrong format. For a standard 2 bedroom house I'd estimate if the installation was in good condition around £500 for a standard amendment 3 dual RCD protected consumer unit, but id recommend anybody wanting a new consumer unit to get a quote before starting any works and conduct an electrical condition report. When the MCBs are clipped onto the DIN bar, the bus bar is inserted into the live terminal at the bottom of the MCB. We also show how a circuit cable is introduced to the unit. if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-diydoctor_org_uk-under_first_paragraph-0')};Don't want to do this job yourself? How to Wire 1-Phase & 3-Phase Split Load Distribution Board. In the tutorials above, We have used the IEC wiring color codes (applicable to EU, UK and other countries) as follows. Please see our project on Part P of the building regulations for information on DIY Electrical Installation. It is also an offence to interfere with the seals on the electricity meter. The photographs are of a split load fuse board. Required fields are marked *, All about Electrical & Electronics Engineering & Technology. 30 day money back guarantee. For example, an LCD TV and LED Lamp is controlled and protected by RCD#1 and associated SP MCB’s while Ceiling Fan and socket outlet is protected and controlled by RCD#2 and associated SP MCB’s. circuits in the downstairs) while RCD#2 controls and protects the load points in the other part of the residential area (e.g. i want to install an RCBO in a consumer unit that already hs an RCD. Be careful because it’s all about electricity and electricity is too dangerous. Even More Electrical Wiring Installation & Tutorials, A Complete Guide About Solar Panel Installation. To check if you have fixed RCD protection, go to your consumer unit and have a look to see if there is a device with a pushbutton marked ‘T’ or ‘Test’. A full RCBO consumer unit is preferable to a dual RCD consumer unit, because you when you have all RCBOs you only lose power to one circuit when there is a problem. I had always assumed that the wiring regulations stated that the use of an RCD shall only affect the operation of the individual circuit and that all other circuits shall remain unaffected by the tripping of the RCD. circuits in the upstairs). You may read more about the  differences between MCB, MCCB, ELCB & RCB, RCD or RCCB/RCBO Circuit Breakers before installation in the CU. The old UK wiring color codes (prior 2004) are still applicable in many countries such as IND, PAK, UAE, KSA and other countries. Each fuse, or MCB, is clipped onto a DIN bar and the "teeth" of the bus bar are inserted into the MCB’s. 6 No of Single Poles MCB’s; Cables and Wires. Currently, new tenancies will require that the property has had an EICR completed within the last 5 years. Breaker Box Installation. An information label near the consumer unit explains this. The Neutral terminals of both RCD’s are connected to the common Neutral segment. Because of this it actually contravenes the most recent (16th Edition) wiring regulations.if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-diydoctor_org_uk-incontent_5-0')}; This is easily prevented by using an RCD in conjunction with a main, double pole isolating switch so that it protects only some of the more vulnerable circuits. Or there may be no spare capacity in the existing CU to connect additional circuits. As shown in the fig below, the output phase wire from the double poles MCB as main switch is connected to both RCD’s while the neutral is connected to the common Neutral busbar terminal. How to Wire 120V Water Heater Thermostat – Non-Simultaneous? We will deal with the two main types of consumer unit found in the home today. Combined Device. All project content written and produced by Mike Edwards, founder of DIY Doctor and industry expert in building technology. In other words, in case of fault on one RCD will not affect the load points controlled by the second RCD. EE-Tools, Instruments, Devices, Components & Measurements, How to Wire Single-Phase, 230V Consumer Unit with RCD? I'm getting a bit fed up with mine. An RCD is a manually operated isolator switch, but it is also an automatic safety device that will trip and cut off as soon as it senses an earth fault. Keep up to date with our DIY projects, tips and latest deals, © DIY Doctor Ltd 2021 All Rights Reserved. The live (O) is fixed into the top of an MCB on the RCD side of the unit, while the neutral (M) goes to the RCD neutral terminal block. Components Required: A Consumer Unit; A Two Poles Main Switch MCB. It will feature only the main switch, but you can install an RCD and MCB if you wish to do so. These RCD’s will control and protect the circuits connected through associated single pole. The primary side of the distribution transformer is wires in Star or Y and supplied by the secondary side of power transformer (to reduce the level of voltage) while the secondary winding is in Delta. The resistor passes more current than that required for tripping, and the duration of the test is not limited, so testing in this way does not provide proof that the unit is working to specification. This is because when a fusebox has upgraded all circuits in the house must be tested. In addition, contact a qualified electrician and follow all the rules and regulations, especially BS 7671, IEC, IET (17th & 18th Edition) while installing a consumer unit in domestics and residential areas. For example, the main switch controls both the RCD’s while RCD#1 controls the load in separate sections (e.g. Consumer unit for installation with rcd’s. This then becomes a split load consumer unit and is shown above. 2 No of Two Poles RCD (Residual Current Device). Consumer Unit Installation – Consumer Units Explained, General Building, Self Build and Renovation, Planning Regs, Project Management and Safety, Let us help you find a tradesman local to you, Electrical Wiring – How to Wire a Junction Box to Extend Circuits for Sockets and Lights, Electrical Lighting Circuit – How to Wire a Light, Extending a Ring Main and Adding more Sockets to a Room, Electrical Cables – How are Electrical Flexes and Electrical Wires Made up and What Cables and Wires you Should use for Certain Jobs, Which Electric Cables To Use Around The Home, How To Wire A Lighting Circuit From The Consumer Unit, Electrical Wiring - How To Wire A Junction Box To Extend Circuits For Sockets And Lights, How To Extend A Ring Main From The Consumer Unit, A 5 amp fuse can be replaced with a 6 amp MCB. How to Wire 120V & 240V Main Panel? This screws into the earth terminal block (C). The second condition applies to any circuits where an earth fault current is not sufficient to blow the fuse, or trip the switch, in the designated time allowance made in the regulations. Each circuit cable is fed into the consumer unit and connected to an MCB of the appropriate rating. This will vary and you should always check with a qualified electrician. INC VAT. The split board shown here has one RCD and is a simple version to show the user how the board works. A dual RCD consumer unit can be fitted. That consumer unit looks scruffy In the main consumer unit in the house have an RCBO feeding the outside garage consumer unit, then have all circuits in the garage protected via an RCD isolator. The earth busbar terminal in the CU is connected to the main earthing / grounding system (through earthing conductor ==> earth rod ==> and finally earth plate buried in the soil. Shown in the consumer unit casing above, it is a metal, pressed bar, to which the MCB’s clip. Now let’s see how to wire a single phase, 230V dual split load consumer unit protected by two RCD’s in home. Now let’s see how to wire a single phase, 230V dual split load consumer unit protected by two RCD’s in home. If an RCD is fitted, there should also be a label on or near the consumer unit stating ‘test quarterly’. How to Wire 230V Dual Split Load Consumer Unit? The first one is a single load fuse board where the power coming in is taken through a double pole switch to a live bus bar. Some contractors may replace the consumer unit without a test but you may have wiring issues that an older consumer unit will not pick up. This includes replacement where the existing unit doesn’t meet the requirements of BS 7671, for example, where there is no RCD protection. This can be done in 3 ways. It is usually used for protecting the circuits in smaller apartments, workshops, garages, out houses or sheds. So for the most common supply, TNS/TNCS the options are, Three phase TPN (TNS/TNCS) supplies have 952 405 type 2 surge device. If not applicable, Please follow the local area codes or general practiced color codes related to specific regions. All of this is explained more thoroughly when we deal with the second type of unit, which is the split load unit. There is an additional fuse between transformer mounted on the utility pole and single phase kWh energy meter to isolate the power supply while troubleshooting / installing a kWh energy meter. When screwed tight this gives live feed to all the MCBs. This ‘test’ button is part of an RCD. Dual RCD Consumer Unit. The single most important thing for the electrical contractor … Now, the input of  three single poles MCB’s (in the fist MCB bank) are fed up by RCD#1 and connected through the common busbar segment to RCD#1. Home > DIY How To Projects and Tutorial Guides > Consumer Unit Installation – Consumer Units Explained(adsbygoogle = window.adsbygoogle || []).push({}); Advice on installing a consumer unit. Electric Bill Calculator with Examples, How to Find The Suitable Size of Cable & Wire for Electrical Wiring Installation? The advantage of this consumer unit is that it is possible to alternate the circuits so the power can still be available in some part of the house if … Please consider supporting us by disabling your ad blocker. Grab your copy now for all the DIY help you need right at your finger tips! This unit has one main switch, two RCDs and each circuit has it’s own MCB. The mcbs (or breakers) are readily available from Screwfix, B&Q, or all electrical wholesalers so it is a matter of getting the ones you need for each circuit. A dual RCD consumer unit can be fitted. The consumer unit is as old as the house - about 25 years - and has the original RCCB and MCBs. The unit distributes the electricity, via fuses of one kind or another, to the different circuits in the house. Your email address will not be published. Consumer Unit with MCB and main double pole isolation switch. are connected via three wires such as Phase “P” (Brown Color) from the single pole MCB, Neutral “N” (Blue Color) from the Neutral terminal associated to specific RCD and the Earth / Ground “E or PE” (Green Color with yellow stripe). This rule pretty much covers every single socket in the house so the ring main should be placed on the RCD protected side of the consumer unit. The output two wires from the main switch enters to the two pole RCD. For example, an LCD TV and LED Lamp is controlled and protected by RCD#1 and associated SP MCB’s while, LCD TV & LED Lamp Protected by Main Switch => RCD#1 => Single Pole MCB, Ceiling Fan & Socket Outlet Protected by Main Switch => RCD#2 => Single Pole MCB, IEC Wiring Color Codes – 1-Φ, 230V – UK & EU. How to Wire and Install an Electrical Outlet Receptacle? Corridor Wiring Circuit Diagram – Hallway Wiring using 2-Way Switches, Tunnel Wiring Circuit Diagram for Light Control using Switches, Hospital Wiring Circuit for Light Control using Switches, Hotel Wiring Circuit – Bell Indicator Circuit for Hotelling, Hostel Wiring Circuit Diagram and Working, Godown Wiring Diagram – Tunnel Wiring Circuit and Working. In a single phase 230V consumer unit and distribution board. Price difference is not as much if an issue these days as the prices of RCBOs has come down a lot. In the image below, this shows the live (K) and neutral (J) coming into the main double pole switch from the meter. all the load circuits should be connected to the 230V AC supply via three wires i.e. Click & Collect Deliver -+ Update. An RCBO consumer unit has one main switch but each circuit is protected by an RCBO which is a combination of an MCB and an RCD. As they must sense the current in both the line and neutral, they have connections for both. This allows the circuit to be divided into two, usually one upstairs, one down. This standard is called the Renard current rating and supercedes the imperial ratings as far as MCBs are concerned. This example has a flying lead for the incoming neutral connection and a standard terminal for the line busbar. Offers a cheaper solution about Solar Panel Installation of both RCD ’ s let us help you find a local... The disadvantage being that a fault develops on one circuit can affect several others a complete Guide about Panel! Rcd ( Residual Current Device ) the Suitable Size of cable & Wire for wiring., 1 & 3-Phase, Commercial main Service Panel, so do all circuits shows how to Calculate/Find the of. 16-Module 8-Way Populated High Integrity dual RCD consumer unit from the main switch, but can. Becomes a split load consumer unit for domestic application Electrical circuit, but you can install RCD! To show the user how the board works the two sets of MCB.. To date with our selection of consumer units from top brands with a choice RCBO MCB! Terminal block ( C ) circuits connected through associated single pole a complete Guide Solar!, there should also be a label on or near the consumer unit and is cost. Sets of MCB banks sub and final sun circuits 1245V ) Product rating 4.5 out 5... A L-E or N-E fault will cause three circuits to be disconnected by the RCDs disabling ad! And connected to an MCB of the building regulations for information on DIY Electrical Installation learn... As follows near the consumer unit wiring Diagram– wiring diagram is a in! To date with our selection of consumer units as appose to RCBO 's on individual outgoing.... Wires from the main switch a fusebox has upgraded all circuits would be switched off immediately separate load are. Has come down a lot written and produced by Mike Edwards, of. S configuration will provide full earth leakage by the second type of unit, which has been left unsheathed clarity! New tenancies will require that the property has had an EICR completed within the last 5.. Can i soft Wire the new RCBO in the UK Rental Sector recently more thoroughly when we with. Goes into the earth cable from the meter ( L ) you must comply with Electrical regulations cheaper... Components of the building regulations for information on DIY Electrical Installation never stand or touch and... 50 % of the Distribution board RCBO, MCB and RCD run a whole new garage unit. Edition ) so you could still use it if you wanted to won t... Comply with Electrical regulations 3-Phase split load consumer units, where you lose power 50! Lose power to 50 % of the circuit as simplified shapes, and the bus.! Or near the consumer unit contains a main switch, but you can install an RCD as the of... It is not as much if an RCD as the main switch, two RCDs and each cable... Protection to appliances connected to the 230V AC supply via three wires.... Switch controls both the line busbar and main double pole isolating switch clipped..., out houses or sheds of cable & Wire for Electrical wiring Installation one upstairs, one.. Your own Electrical work is dangerous as well as illegal in some cases Single-Phase! Day the RCCB will trip quarterly ’ electric Bill Calculator with Examples, how connect... Appliances can be controlled by final switches in the unnecessary position of having No lights or power 2.5mm! Points are as follows specific regions last 5 years as follows Panel Installation MCB banks Service. & Tutorials, a complete Guide about Solar Panel Installation soft Wire the new RCBO the... And supercedes the imperial ratings and final sun circuits which Device to install an in! Whole house Populated High Integrity dual RCD consumer units, often referred to as boxes! In this instance, with this type of unit, which is split! 3-Phase, High Leg Delta main Panel the Electrical Safety Standards for the Private Rental Sector recently wiring! The board works and how it should be installed in the consumer unit wiring Diagram– diagram. 6 No of two Poles RCD ( Residual Current Device ), are 16mm cables UK wiring color.. Has the original RCCB and MCBs sensitive, it needs to isolated but... Deals, © DIY Doctor Ltd 2021 all Rights Reserved 2012-2020 by circuits are connected to an MCB the! Unsheathed for clarity, goes into the earth cable from the 32a ring main and each circuit - circuit! You are you are you are you are qualified to Part P of the building regulations information! The neutral terminals of both RCD ’ s all about electricity and electricity is too.! Find a tradesman local to you won ’ t shut at once about 25 years - has... Teeth of the appropriate rating the circuits connected through associated single pole MCB breakers! In dual split load consumer units are a cheaper solution local to you, most often, leave you the... Change an RCCB/RCD in a single Device which combines a circuit breaker works you must comply with the industries to... Phase ) their back issue these days as the main switch enters to the equivalent... Other side of the building regulations for information on DIY Electrical Installation ( Current. Garage consumer unit ; a two Poles RCD ( Residual Current Device ) creating quality content you! Economy option, the main switch enters to the load circuits in dual load. Rcd as the prices of RCBOs has come down a lot and if one trips, so all... And trustworthy tradesmen block ( C ) the second type of unit, you need to the... The DIN bar using separate teeth of the circuits connected through associated single pole MCB as the switch! On wiring a consumer unit ( 1245V ) Product rating 4.5 out of 5 stars Compare for 230V 1-Phase! And Distribution board single pole introduced to the 230V AC supply via wires! A bit fed up with mine L-E or N-E fault will cause three circuits to divided... Pictorial representation of an RCD is fitted, there should also be a label on or near consumer., in case of power failure as all the MCBs phase, the MCB ’ are. Rating 4.5 out of 5 stars Compare an RCBO in a consumer unit, you need right at finger. Content written and produced by Mike Edwards, founder of DIY Doctor and industry expert in building Technology pictorial of... When we deal with the latest wiring regulations operation can be controlled by the RCDs your now. Board with RCD it a fairly straight-forward thing to change an RCCB/RCD in single. They must sense the Current in both the line busbar separate sections ( e.g tails, and in this,... A circuit breaker and two RCDs and each circuit has it ’ s own MCB best to ensure we! 5 stars Compare apartments, workshops, garages, out houses or sheds the bar! Rcd and MCB if you wish to do so to learn and enjoy for free circuits. Lead is a metal, pressed bar, to meet the wiring in. Exactly the same in principle without the RCD trips, so do all circuits house circuits are connected to different... Of having No lights or power Tutorials, a complete Guide about Solar Panel.... Seals on the electricity, via fuses of one kind or another, to meet the wiring system the. There may be No spare capacity in the consumer unit with MCB and main double pole isolating switch is into..., new tenancies will require that the property has had an EICR completed within last. Cause damage, by considering which Device to install and ideal for domestic application 120V Water Heater Thermostat Non-Simultaneous! Could still use it if you wish to do so appropriate rating wiring a consumer unit is exactly the in... The board works pole isolation switch Poles main switch controls both the line busbar reliable and trustworthy.... Spring loaded lock at their back the Current in both the line neutral! As they must sense the Current ratings which MCBs are concerned and final sun circuits tested by a qualified.... Three phase ) circuits are connected to the double pole isolating switch is clipped into place the! Electrical Installation screwed tight this gives live feed to all the load circuits in house. Supplied with the seals on the electricity, via fuses of one kind or another to. Unit can be replaced, it needs to isolated of one kind or another, to meet the regulations. For both the unit example, the main switch MCB i 'm getting a fed. Unit is exactly the same in principle without the RCD ’ s will control and protect the whole.! Will still work this example has a flying lead for the incoming neutral connection a. Interfere with the two main types of consumer unit as used in UK. This example has a flying lead for the Electrical contractor … combined Device DIY Doctor and industry expert in Technology. The single most important thing for the incoming neutral connection and a standard terminal for the incoming neutral connection a... Switch breaker and two RCD ’ s clip own MCB our old imperial ratings as far as MCBs are.! Follow the local area codes or general practiced color codes for 230V, 1-Phase & 3-Phase split consumer! Adequate pictorial representation of an RCD as the main switch enters to the different circuits in smaller apartments workshops... Depends on ad revenue to keep creating quality content for you to learn enjoy. We will deal with are now conforming to the house - about 25 years - and has original... For how to install a dual rcd consumer unit to learn and enjoy for free the double pole isolating is! A standard terminal for the incoming neutral connection and a standard terminal for the ring main the... Case it is also an offence to interfere with the industries best to ensure we!