special locations and certification

[Mikey W]

hi Guys
I have often looked at threads for advice and now become a member.
I have a question regarding the certification of a special location and circuit characteristics.

1. I have recently joined the NIC but as yet not got all my membership details through and wondered if there was a certain certificate for work in a special location as this is notifiable work?(bathroom downlights and fan switching to exterior)

2. The circuit for the lighting is currently on a re-wireable fuse(3036).
looking at reg 701.415.2 supplementary bonding it refers to a calculation r is less than or equal to 50v / ia(current needed for automatic operation in 5 seconds) to prove the effectiveness of supplementary bonding. in meeting this criteria am i right in thinking it is ok for the circuit to remain on a 3036 fuse?
If not does anyone have opinions of the best way to get round this by maybe addition of a small board with rcd or rcbo? can think of many ways to do this but open to advise of the best way as a board swap is not really an option at this moment in time.

apologies if i haven't put enough detail any help is greatly appreciated and any criticism is welcome.
Many thanks in advance
Michael

 

[Darkwood]

Welcome to the forum

 

[Leesparkykent]

You should be providing RCD protection as its a bathroom. A few options would be to install a separate rcd in an enclosure and run that particular circuit through it or an RCD fused spur if the way its wired allows. Certificate wise you either use a minor works or Installation certificate depending on the type of work carried out and notify the job online.

 

[Pete999]

What Lee said he beat me to it.

 

[Mikey W]

thank you all and thanks Lee i did think that was the case supplied via rcd its just i like to read up on the regs at times and found the info a little misleading/confusing as to me it suggests if the circuit is exiting and the supplementary bonding is proven then it can remain on the existing fuse.
its normally the case of new circuits and fuse boards to bring up to spec but this particular job it wasn't fees able.

 

[Mikey W]

hi guys just thought i would post up my findings these were obtained from the NIC technical dept

so the existing install is on a re wireable fuse(3036) and reading in 7671 states that if supplementary bonding is achieved and this is the "additional protection" therefore as additional protection is there there is no need for it to be put on an rcd.
and referring to my original post the supplementary boding is proven by the calculation i refer to.

 

[telectrix]

701.411.3.3 (bgb) is quite specific. any new work in a bathroom must be RCD protected, irrespective of supplementary bonding.

 

[Risteard]

Indeed. Every circuit in the location being RCD protected may remove the need for supplementary bonding (but only if every condition for it not being necessary is met), however the existence of supplementary bonding does not remove the need for every circuit in the location to be RCD protected.