2357-304 a

[elbaboy]

hello there currently i'm doing the 2357 as a electrical installation year 2 i have two assignment to complete which are 2357-304 Task A and 2357-304 Task B the task B i have completed all which had to do with cable calculation. now on the task A almost i have completed but I'm looking for some help with a question
which says.
List type and rating of BS EN 60898 circuit breakers used within the distribution boards from the following circuits1 the distribution board in the work shop
2 on the shower units
3 the kitchen downlighter circuit
4 a downstairs lighting circuits with a load of 1kw
any help it will be appreciated elbaboy

 

[cmac70]

Your on site guide should be of help to you with this task. Also cable calc task should be able to work out your downstairs lights. You think of possible answers. You will be helped if you try.

 

[elbaboy]

is that page 91 in O.S.G 2008 i'm right?

 

[elbaboy]

i'm sure it is Type B because of it is a domestic installation i'm not sure the rating on those circuits

 

[cmac70]

Type b is domestic. Your rate will be found using amount able to carry. Keep at it your getting there.

 

[cmac70]

Just a thought is workshop 3 phase our do they only want you to use single phase for now.

 

[elbaboy]

circuit number 1 Type B at 32A ?
Circuit number 2 Type B at 32 A?
Circuit number 3 Type B at 6 A?
Circuit number 4 Type B at 6 A?
i'm I right?

 

[elbaboy]

yes it is single phase just for my memories what about the three phases thanks

 

[cmac70]

Well 6A will take 1440 w. So depending on overall watts you should be okay. The others seem fine to me. Workshop my be go for 40A depends what will be used. You could include diversity.

 

[elbaboy]

Thanks sir I don't have enought info about the workshop for what will be used I hope it will be ok type b 40 a circuit 1

 

[skydog23]

Is the workshop on fluorescent tubes or discharge lights?
And if so how many, as selection of breakers for these types of circuits may dictate you use a C type breaker for start up inrush current, just like motor circuits.
Just a thought