RCD's in parallel

[dmc]

Hi,
Working at a house (TT system) and a new build office/garage is to be built.
House has split load RCD board.
1. Should i use 1 of the spare ways and feed the office with a sub-main. or
2. Use henley blocks and take the supply from meter tails.

Option 1, will mean if the house trips then the office supply will turn off.

Option 2, the mains cable to the office will not be RCD protected and it is a TT system.

Thanks dan

 

[Andyrc]

Richard W, HOW? will the RCD in the GARAGE!!!! protect the "supply" cable? from the house, as it's UPSTREAM of the RCD, on the SUPPLY side NOT down stream on the "load" side, please Explain!! ANDY, 20+ YRS ,JIB, 15th/16th/17th EDITION (it needs a 100ma time delayed) supplying the garage/office if? TT at Origin of Mains I:E house side)

 

[Richard]

Richard W, HOW? will the RCD in the GARAGE!!!! protect the "supply" cable? from the house, as it's UPSTREAM of the RCD, on the SUPPLY side NOT down stream on the "load" side, please Explain!! ANDY, 20+ YRS ,JIB, 15th/16th/17th EDITION (it needs a 100ma time delayed) supplying the garage/office if? TT at Origin of Mains I:E house side)

I think you want to check who you addresssed that too! That was exactly the point I was trying to establish!

 

[Mark.W]

Ooops

That's what you get for trying to answer 2 threads at once. There was another thread similar to this on the go at the same time.

Soz Chaps