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page 36 big red book- U- voltage between lines (phase, live, tingly wire,etc) Uo-nominal a.c rms line voltage to earth (earth, neutral) all single phase systems are 230v, U not applicable, and all 3 phase systems are 400v between phases (U) and 230v to earth (Uo) Tis all in the big red...

hhmmm... dodgy! not really a proper TT though, was it bonded? i dont think thats ever been an acceptable practice. That does raise the further question, whats the R1+R2/ R2 reading for the lighting circuit? Does it have a cpc or not?

OP says a high ELI on the circuit, not lack of CPC. I take it this is a different lighting circuit to what you've been working on. How high is the EL? As stated early, you should have either done more thourough tests before quoting for a board change, or made the customer aware of possible...

heres a pic or 2 As you can see certainly looks like a meter change done incorrectly. Ringing the DNO today, Im also trying to get hold of a test done by a 3rd party logging the power usage of the building. will post what happens later

steptoe you're confusing me mate! Perhaps I'm not being clear enough on the details. Ive measured 480 volts L1-L2 at the service head before the meter, managed to get a probe in to where L2 should be connected and to L1. the single phase meter is connected to L1. After the meter the supply...

why?

my exact thoughts were also a meter mans mistake. He's also left a small amount of copper showing from neutral at bottom of meter. I'll put a photo of the meter box on tommorow, but theres a gap where the small plastic knockout from the second fuse has been removed, like there used to be a cable...

Hi all need a bit of help with a remidial from one of my PIR's. Its from a PIR at a carehome. One of the defects is the supply from the cutout to the main DB. TT system, split phase. The main DB is about 10metres away from the cutout, which is in a meter box on an o/s wall. The supply is run...

cheers for replies all, good to hear everyone elses view. After careful consideration I have decided- 1. time and half 7-10pm, 2. double time 10pm-6am. 3. Sack off badgers lines!!! what sort of commision jobs do you do sidewinder?

mornin all. even though im 20 mins late this morn for some reason i still feel ive got time to post... anyhow, gotta put some prices together later- i was wondering what sort of price people would put in for unsociable hours? from say 7pm-7am? time and a half? or double time? i charge time...

think everything you said contributes to my choice, obviously gotta be a good price. But I would be happy to pay a small amount more for a reliable company (such as yourself :-) I do always like a good freebie too, and yeah its definately gotta be useful. Choice of work stuff would be best-...

you can get fire rated fittings that arn't so large. TBH i find those big fire rated ones a nightmare to fit into the ceiling, springs can be really tight and wreck a ceiling. whats above the kitchen?

any job i've been and had to fit a fused isolator has always gone in box if there. with only 3metres of tails to play with where else are you supposed to put it? Take it the assessor gave you no practical alternative. Just a 'no'?

spot on! thanks very much my friend, great help

what i mean is how you gonna get the cable into the loft, clipped to the wall/trunking or plastered in? if plastered then the <50mm reg applies.

Ive paid for the thomson local for this year in conjunction with napit. basicly in the book there'l be a napit ad with a list of napit installers, me being one of them. have a look in the yellow pages, theres always ad's like this for NIC, sometimes full pages pretty crap really doubt i'll...

Hi all Im after a manual for a Menvier MF400 fire alarm panel cant seem to find one on the web, even the cooper website. does anyone have or know of where i can obtain a copy? Or if anyone knows of a site with a list of different manuals to download (for free), even better. thanks matt

depends on where the 4mm run into the loft is installed, if its within 50mm of a surface of a wall then it will require 30mA RCD protection, but as stated, not a good idea to change the 100mA. Is the 100mA a time delayed RCD? If not you will not acheive discrimination between the garage RCD and...

is that with all conductors removed from the DB? tested with lamps in? sounds like it could be same fault- maybe picking up through lamps and possible borrowed neutral? what readings do you get between the up and down circuits, neutral in particular? If each circuit does have seperate faults...