Discuss wiring up a meter in the Electrical Forum area at ElectriciansForums.net

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ExArmy

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I did a board change today and upon powering it up the display on the key meter is broken. the LCD backlight comes on, but the screen is blank. any ideas? also i completely forgot which way the tails go, so i just put them back in as i would do for a normal meter (never really had much to do with a key meter before) as they were no markings on the meter. I put them in L N N L, i did a polarity check at the top of the MS so i assume it's ok...?
 

telectrix

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get client to phone supplier. tell ' em it's just broke. as long as you,ve got the in to the left and the out to the right with correct polarity ( L.N.N.L. should be correct).
 
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ExArmy

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so all meters are wired up like L N N L? a bit worried incase i've somehow by passed the meter and get fined for scamming free electric from the grid!

- - - Updated - - -

DNO key meter
 

bradder

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There should be a wiring/connection diagram on the inside of the cover that you remove to access the terminals.
 
S

Swicade

At the risk of starting a debate/arguement i'm confused as to why tails where disconnected from the DNO meter in the first place.

Maybe it's just the fact i do things differently (and possibly wrong) but i never touch the DNO meter's at all when doing a board change......i usualy dump my new tails into Henley blocks and tag the old tails into the same blocks after the meter.

Only meter's i've ever connected into are customers own meter's (usualy card/coin meters) and they've all been L,N,N,L....supply on left,outgoing on right.
 

snowhead

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Has the meter failed due to the cover being removed, or loss of power as anti fraud protection?
 

darkwood

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If its a smart meter you may have just dropped yourself in it, as they log all events and although we all know what you have done here is commit a crime by tampering with meter / connections etc i cant fathom why you would remove all the tails and not just the out-going as this would only leave you with 2 options in which one would be incorrect polarity and a voltage tester would have simply avoided that. (after thought unless you were uprating the size)

Modern smart meters now can log a power loss to time and date and if this dosn't correspond to a power failure in the area they may be asking the occupier to explain why there has been an interuption to the meter..... at the thought of legal proceedings i think many tenents or home owners will gladly offer up the info of who was responsible..... Not that i ever accessed a meter ;) but i wouldn't even contemplate it now as you are linked now by time and dates where as before they couldn't really prove when the interference was caused.
 
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Knobhead

Try inserting the customers key and see if you get a display.

Why did you remove the terminal cover? It’s the only mistake you’ve made.

I’ve done it years back to get rid of about ½ dozen VIR’s crammed in the meter out going.
 
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darkwood

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Has the meter failed due to the cover being removed, or loss of power as anti fraud protection?
A nice thought but legally i dont think they can have a system in that would stop the meter working as they need a court order to disconnect a supply and having a meter to pre-programmed shutdown could be a health and safety issue.
 

garysparky1

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You need to ensure incoming supply is on the left of the meter and load to CU on right if tails wrong way readings will decrease and the supplier won't be happy
 

Landril

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Mine is already done, if the DNO ask ill say wife has started a few DIY jobs around the house :hurray:, get out of jail free card !!!
But seriously why u need to take all the tails out for a board change, surely the 2 going to the load would have been sufficient...first time changing the board?
Anything before that fuse (including fuse) is not your problem but the DNO's
 
1

1shortcircuit

On the bottom right corner of the key meter there will be a grey button and blue button. One of them will take you through all of the rates etc.

Try pressing these and see if the display comes back.

I have a meter that is playing silly buggers and on some occasions when needing to insert the key the display goes bonkers but I have found that pressing the buttons eventually brings the display back.

I presume you have uprated the main tails from service head to meter and meter to CU due to being undersized? If I ever need to do this then I ALWAYS do one at a time, I just find it easier and saves situations like this. On some jobs I take photos on my phone as a reference to go back to.
 
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ExArmy

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well just to finish off this thread...

i went back today to put a 10mm into the board for a new shower that had finally been installed, the customer said the meter guy just turned up next day , complained that another spark had pulled the fuse and meggered the meter, and fitted a new one sealed it up and left. from what the customer told me, it happens alot with the key meters?
so i'm not being prosecuted by the DNO. good news lol
 
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