EICR coding

[martinh287]

Hi guys

After advice doing EICR report on a welfare set up on a building site I am after advice on my coding

welfare set up is on a tn-s protected by 100ma main rcd tripping out at 42.3ms at x1 I have some covector heating circuits on a c16 mcb but zs is to high for the c16 what code would you guys code I coded c2

Also a light has been installed in a toilet area using a b6 mcb with 2.5mm swa the light switch is on the inside wall of the toilet room and 2m away from the sink, the light switch switch surface mount metal clad the same goes with the water heater fuse spur that is also metal clad and there is no 30ma additional protection on any of this circuits I put c3 for this

 

[jaydee81]

does the toilet area contain a bath or shower?

 

[martinh287]

No just the sink basin

 

[jaydee81]

no need for 30ma rcd protection all surface wiring in swa no bath or shower so no code at all its fine as for heater mcb is protected by 100ma rcd so would trip in an earth fault but does require replacing for B 16 so code 3

 

[telectrix]

agreed^^^^^

 

[martinh287]

Cheers for the advice after having some downtime I'd realised the toilet light switch/ fused spur was ok but looking at it I just did not like it

So zs values higher then mcb max zs values are only code 3 if protected by 100ma rcd on a tn system

And zs values in relatation to mcb max zs values are irrelevant on a TT system as protected by rcd

 

[yellowvanman]

So zs values higher then mcb max zs values are only code 3 if protected by 100ma rcd on a tn system

personnaly I think no code if 100mA is not time delayed - check out 411.4.9 (sorry only have BRB in office - don't think its changed though!)

 

[martinh287]

Rcd is a vels unit with selective time delay currently set at 0