Coding

[Mark shaw]

Hi all my question is,
What coding is the following.

1. Lighting circuits in property rented to students, circuits chased in walls. No rcd protection.

2. All types of Circuits in a school without rcd protection. Some chased some surface.
Would all above be on a c3 and safe for continued use?

 

[telectrix]

code C3 as long as correct protective device is installed, and disconnection times are within limits.

 

[Mark shaw]

Yes just looking at table 41.1 disconnection times
Tn 0.4
Tt. 0.2
These Times can't be met with bs 60898 alone????

 

[Rampantchilli]

On the first one, you would want to check for supp bond in any bathroom/special locations before issuing as c3 if the lighting circuit covers those locations, if t does and there is no supp bond then c2

as for second one, I'd say c3

 

[Mark shaw]

Thanks mate.