Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed relay.

[Stu Too]

Just had my Part P Assessment (and passed!)

Although I was asked one question particulat question ... so Stuart, whats the disconnection time of an S Type Circuit Breaker with timed relay. My jaw and other parts of my body hit the floor!

Funny thing is after I tried for 5 mins, he couldnt find it either.

Apart from that blip in my knowledge it went well, and the Assessor was great, some really good advice.

So I am now part of the happy band of inbetweeners, sorry domestic installers. (no offence to any exisiting DIs). Which is one step up from being an ex builders sparky, no offence intended to builders sparkies

I wonder if I can get away with saying I am D.I. Jones.

Anyway - enough rambling, answers on the back of a postcard or apporpriate thread response.

 

[zedess]

Re: Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed re

Little red book page 91 will give u tripping for time delayed rcd...now s type circuit breaker? with timed relay?....thats a tough one!

 

[JUD]

Re: Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed re

If you mean a time delayed RCD (Type S) then trip times are:

1 x IΔn = 130ms (min) & 500ms (max)
2 x IΔn = 60ms (min) & 200ms (max)
5 x IΔn = 40ms (min) & 150ms (max)

Table 3A (page 243 BRB)

 

[Stu Too]

Re: Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed re

LOL Knew someone would know where it was. Thanks for that. NPOt the easiest thing to find in there though! Only found it just now because you told me what page it was on

 

[JUD]

Re: Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed re

Made me laugh that the guy asking you the question didn't even know where to find the answer.

 

[martysparky]

Re: Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed re

I bet he had it written in the back of his and I bet you looked at the contents page after you'd found it and thought why couldn't I find it.

 

[Stu Too]

Re: Part P Assessment ... disconnection time of an S Type Circuit Breaker w/ timed re

Most probably Marty - but really glad I got through. Got the Approved Contractor pack today