pir testing flat, fault code

graham123 · Jul 13, 2011

am currently doing a pir on some flats, and need some help on a fault code. In the basment their is 4 bs88 isolators off the supply, which feed the 4 flats, the submain to each flat is a 10mm TE with no seperate earth, which means earth is undersized, correct? 1,2 or 4? falutcode as its 4mm. Also the bs88's are 100a which exceeds the rating of the cable, is this a 1,2? thanks

james the spark · Jul 13, 2011

I would say a 1 for both its all just your opinion really.

graham123 · Jul 13, 2011

thats what i thought, thanks bud

roukel01 · Jul 13, 2011

incorrct sized earthing is usually a 2, same with the overrated fuse for the cable UNLESS there are signs of overheating etc

malcolmsanford · Jul 13, 2011

graham123 said:
am currently doing a pir on some flats, and need some help on a fault code. In the basment their is 4 bs88 isolators off the supply, which feed the 4 flats, the submain to each flat is a 10mm TE with no seperate earth, which means earth is undersized, correct? 1,2 or 4? falutcode as its 4mm. Also the bs88's are 100a which exceeds the rating of the cable, is this a 1,2? thanks

Read Regulation 543.1.1 before you put on code down for that CPC.

The incorrect size of the protection device can be a 2 yes.

IQ Electrical · Jul 13, 2011

roukel01 said:
incorrct sized earthing is usually a 2, same with the overrated fuse for the cable UNLESS there are signs of overheating etc

They're both Code 2's at worst, assuming the cpc doesn't comply by calculation, reserve a Code 1 for immediate danger ie. exposed live parts etc.

Take a look at this: http://www.esc.org.uk/fileadmin/user_upload/documents/industry/best_practice/BPG4_08.pdf