testing, how many points served

[elec_student]

Hi, just a few questions about testing, first i'd like to ask how do you work out how many points are served in say a lighting circuit,? is it the switch and all the lights or just lights, have searched my college files and cant find reference anywhere.

Also, on a certificate what do they mean by MAXIMUM DEMAND and how do i go about calculating or assessing this??

How do you find the fuse rating or setting of a main switch or do all main switches not have this setting???

For the pfc do i just do If = Uo / Zs or shall i just use the 16kA???

I think that is all at present guys but if you could help any i would be grateful, im sure ill have many more questions...

 

[Qedelec]

I assume your referring to the test forms for inspect and test. Just count all current using points so just roses but if you have wall lights they all count. The purpose of the question is to work out the total load.

Also, on a certificate what do they mean by MAXIMUM DEMAND and how do i go about calculating or assessing this??

Add up all the circuits take account of diversity, check OSG page 85

How do you find the fuse rating or setting of a main switch or do all main switches not have this setting???

Main switches are usually marked with current rating.

For the pfc do i just do If = Uo / Zs or shall i just use the 16kA???

Measure it with your meter or calculate as you have said above, 16KA is the breaking capacity.

 

[Qedelec]

By the way elec, if you want ant exam papers mail me and I will look them out for you.