rcd protection 17th edition

[DYCHE4230]

Luke, RCD's only required for S/O 's up to 20A unless feeding equipment oudoors. So a 32A BS4343 (BS EN 60309-2) inside wouldnt need one

Sorry Shakey...so 20A radial for freezer only, would n't require rcd protection if the cable is buried more than 50mm.......but would if cable was buried less than 50mm?

The grammar they use in the regs is worse than mine, I think????

 

[ian.settle1]

As far as i know industrial and commercial are beyond the scope of niceic as they only have powers over domestic (setup for part p). For how long who knows

Where did you get this information from as the NICEIC has been going a lot longer than part P and they have been issuing certs for industrial and commercial work for this length of time

 

[montybaber]

I also work as a maintenance electrician and frankly fitting RCD's on s/o's in certain circumstances would mean zero productivity.

RCD's do not like damp 415-200v three phase transformers fitted in almost all of our japanese machines! also inverters tend to cause nuisance tripping.

Personally I like fitting them and protecting the circuit is a very good idea (specially in an environment like ours, water etc) but in reality with the kit we plug into it they are impossible to work with so i'm glad you can interpret the regs that way.

 

[tony.towa]

Coomercial and industrial premises come under the EAWR and according to the ECA the designer can therefore assume that all personel are supervised, instructed etc. They do state however that if the premises have socket outlets that the general public have access to (e.g. internet cafes) these will require RCD protection.

 

[Carter]

Coomercial and industrial premises come under the EAWR and according to the ECA the designer can therefore assume that all personel are supervised, instructed etc.

Which ties in with the 50mm depth requirements. From conversation with my 17th Ed. lecturer, that requirement is there to reduce the danger from shock from homeowners who through ignorance fix their diy shelving through the middle of a sunk T&E cable of a Saturday morning. In the commercial situation this eventuality will not forseeably arise and the requirement can be dispensed with as any work will be undertaken by competent/skilled/instructed persons not young Damien from the Post Room.