Discuss fuse box upgrade in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

M

MattL

Iv recently upgraded a consumer unit in a small terraced house.When I carried out an inspection I found that the sockets I sampled were spurred, the tests i did I.R, ZS, polarity were fine.When i changed the board it appeared there were two ring circuits.I know the 3 step method of proving a ring final as recommended in bs7671, should i of carried out this test ?Thanks if anyone can help.
 
Iv recently upgraded a consumer unit in a small terraced house.When I carried out an inspection I found that the sockets I sampled were spurred, the tests i did I.R, ZS, polarity were fine.When i changed the board it appeared there were two ring circuits.I know the 3 step method of proving a ring final as recommended in bs7671, should i of carried out this test ?Thanks if anyone can help.

Hi there.

Got to be honest here but your post causes me great concern. If you dont know how to carry out basic inspection and testing then you should not be replacing consumer units.

What size MCB's did you use for these circuits as you may have installed 32A MCB onto a 2.5mm radial!!!.

End to end tests to prove a ring circuit are one of the most important tests to do and are one of the first tests I do for obvious reasons (continuity of ring final circuit conductors). You mention you did I/R and Zs tests, what about the R1+R2 readings???

If I were you I'd be straight back round there now!!! carrying out a full Electrical Installation Certificate to make sure what you have done is safe.

Do you intend registering this with LABC???

I apologise if I sound harsh but you seem to lack the knowledge needed and may be endangering the safety of others.
 
Hi.

This is a basic list of tests in sequence that you should be doing on completion of a CU upgrade

[FONT=Arial, Helvetica, sans-serif]Test 1 : Continuity of protective conductors[/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 2 : Continuity of bonding conductors [/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 3 : Continuity of Ring final circuit conductors [/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 4 : Insulation resistance [/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 5 : Polarity testing (dead)[/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 6 : Polarity testing (live)[/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 6 : Earth fault loop impedance [/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 7 : Prospective fault current (PEFC + PSCC)[/FONT]
[FONT=Arial, Helvetica, sans-serif]Test 8 : Functional test [/FONT]
 

Reply to fuse box upgrade in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock