Homework help

[Edtwozeronine]

I'm looking for the section in my on-site guide that covers disconnect times for circuits over 32a. In my regs class my homework features a circuit with a type B 45a RCD.

EDIT: oops never mind I now see it says anything exceeding 32a must not be more than 1 second.

I thought there was a more precise number than "less than 1 second" though?

 

[Bobster]

I'd re read that.

 

[Andy78]

you might want to double check that info

 

[Richard Burns]

Just check on which earthing system you are using as the disconnection times are different for TN and TT.
1 second is fairly precise it is 1000ms instead of 200ms for TT.

 

[Edtwozeronine]

It's a TN-C-S PME system in the question.

 

[Richard Burns]

In the on site guide (yellow) 3.5.2 would apply, but not 3.5.3, which is what you have stated.
Therefore the disconnection time would be 5 seconds.