Discuss testing a B&B without disconnecting bonding in the Periodic Inspection Reporting & Certification 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

S

shedhopper

Hi This is my first post. I'm trying to test a working hotel / B&B at the moment and even though I'm Insulation resistance testing live AND neutral to earth on the lighting circuit as an agreed limitation; I'm still getting a zero reading. I suspect it might be something to do with 16th Ed bonding but I can't disconnect the bonding conductors at the board as there are people in the property at all times. Has anyone had an experience like this? Any suggestions how I could proceed or should I just tell the owner that a working hotel is an un-testable hotel?
Thanks a lot
 
If its a 3 phase DB with a triple pole switch, then unless you switch off and disconnect the neutral link you will always have N-E continuity (PME). If its single pahse with main switch off then it sounds like you have a fault?
 
I presume this is with the neutral disconnected from the Neutral bar?

If so, it will most likely be due to a borrowed neutral, that will still be connected to neutral bar.

Are most of the insulation resistance readings high?
 
It will have nothing to do with the bonding connected !

Are you disconnecting the neutral ?

Whats the reading when you switch to low ohms from Meg ohms on your meter!
 
Hi yes it's single phase with the main switch off. You're right it could always be a fault, I just thought I'd post in case anything obvious I'd missed came up. Thanks a lot
 
Yes neutral disconnected, most other IR readings are nice and high. There are still a couple of untested circuits in the DB so I'll look out for that. Thanks
 
Good to know its not the bonding then, thanks. Yes the neutral is disconnected, I'm testing the circuit on its own, not the entire DB at once. Whe I go from Low Ohms to Meg Ohms the reading is clear, waiting for me to hit test (meger 1720)
 
Will you be disconnecting every circuit in the DB to test?

If so, you may find another circuit with very low reading. If this happens, disconnect both circuits neutrals (with circuits isolated, of course) and try the test again. If the test is clear with both removed, it is most certainly a borrowed neutral.
 

Reply to testing a B&B without disconnecting bonding in the Periodic Inspection Reporting & Certification 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