Discuss Garage consumer unit in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

I agree with Taylor.

As it is a distribution circuit and not a final circuit it does not require RCD protection. However as it is TN-C-S it must be TT at the garage end. I'm sure you are not to export the earth from the house.

Is the water supplied via metallic pipework?

Could you not split the tails at the house end, install a small garage unit next to house CU, use 100A main switch and suitable circuit breaker to supply garage CU which will have its own RCD?
 
The house is TNCS, and the cable run to the garage approx 25m. Yes water at the garage. As the swa is not feeding any sockets or lights direct but is via a garage consumer unit I don't see why it requires a 30ma rcd at the house. If someone were to get a shock in the garage it would trip the rcd in the house and could be reset by someone in the house unaware why it's triped. Hence the 30ma rcd at the garage.
He is runing the swa from dual rcd cu.
So what does he do with the rcd on the side where the swa is run ftom??
 
Thanks for the replies, but what I am asking is about the protection feeding the garage consumer unit? The garage consumer unit has a 30ma rcd and 2 mcb's for lights and sockets. What I don't want is a 30ma rcd feeding another 30ma rcd from the house to the garage. As this is a domestic premises reg 411.3.3 requires additional protection for sockets not exceeding 32A via a 30ma rcd. And reg 411.3.4 requires that AC final ciruits with luminaries requires additional protection via 30ma rcd. As this is not an "AC final circuit" I'm asking what is normally best practice. As it will be a clean run of SWA cable between the 2 is it best to use a switch fuse from the house to the garage or a 100ma rcd and mcb. My thoughts are that an rcd would be the better option. Yes the garage can be a TT system.
What do you mean by it not an 'AC' final circuit? ?
I thought both the circuits are AC final circuits.
 

Reply to Garage consumer unit in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock