What is a dual split consumer unit?
What is a Dual Split Load Consumer Unit? Dual split load consumer unit contains a main switch breaker and two RCD’s to control two separate load points. These RCD’s will control and protect the circuits connected through associated single pole MCB circuit breakers.
Why do consumer units have 2 RCD?
Dual RCD consumer units are supplied with a mains switch and two RCDs, residual current devices, designed to enable the configuation of two banks of circuits.
Can you have 2 consumer units in a house?
You can certainly have as many CUs as you want. There is a BS 7671 regulation demanding that every installation has a (singular) “main switch”.
Can you use RCD as main switch?
1 – can you use the RCD as a main switch for the installation – yes, all RCCB’s that meet BS EN 61008 are rated for isolation.
Can you run a consumer unit from another consumer unit?
Yes you can fit second consumer unit common when supplying showers and sheds you may have to use two lighting circuits as most light fitting need fusing to 6 amp. There are three ways to connect with henley block or from existing consumer unit and latter with approved cable or twin and earth.
What size cable do I need for consumer unit?
As others have said, 16mm swa is fine in most cases. If in doubt, run it in 25mm.
Can you wire a consumer unit from another consumer unit?
Yes it would be acceptable to run new circuits from a secondary CU. However rather than feeding the new CU from a spare way in your existing board it is best to split the incoming tails from the supply in to a henly block and run new 16mm tails from the henly block to your new board.
How to wire a dual split load consumer unit?
Cables and Wires. How to Wire a Dual Split Load Consumer Unit? 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.
Why do we use split way consumer units?
For this reason split way consumer units are preferred. The latest consumer units have twin RCD’s which offer earth leakage protection to circuits on either side of the consumer unit. Another option is to use RCBO’s which is a MCB and RCD combined into one unit.
How to connect single phase 230V load circuits in dual split load cu?
In a single phase 230V consumer unit and distribution board. all the load circuits should be connected to the 230V AC supply via three wires i.e. Phase, Neutral and Earth/Ground wires. The following fig shows how to connect single phase 230V load circuits in dual split load CU.
Why do split way consumer units have twin RCD?
This means that the lights will go out and you could be plunged into total darkness! For this reason split way consumer units are preferred. The latest consumer units have twin RCD’s which offer earth leakage protection to circuits on either side of the consumer unit.
