Irish Electricity meter dating from the late 60s - early 70s:
ESB domestic single phase 220V meter dating from the late 60s/early 70s. Mounted in a recessed meter box on the exterior of a house. The cables exiting through the top on the consumer side would be illegal these days. The ESB only allows access through the channels at the bottom for fire safety reasons.
Djk, Paul, Thanks for the pics!. We still have a HUGE number of these Ferranti meters in current use over here. Are they made in Italy?. We also have a lot of English Electric(brand-name) meters in use over here too on older installations. Newer installs, generally get a grey coloured ABB meter for single and 3 phase installations.
In Austria all wires would be run behind the board and only come through holes behind the terminal cover. And we don' t have these nice warning tags, only a small tag, stating the date of meter installation, meter number and initial reading, plus the siganture of the guy who sealed it. If the meter was only replaced there's also number and last reading of the old meter on it. Looks like 4 or 6mm2 to me. 35A Diazed? or only 25?
All newer ESB meters have a full double pole isolator on the bottom.
You litterally have a situation where you've got:
Fuse - Meter - Double pole isolating switch - (power company end) The idea being that the power company or electricians can fully and safely isolate the supply. I remember seeing one system where throwing the main switch on the distribution board left a circuit wired on a sub-panel live!
going to --- double pole isolating switch - neozed fuse (63amps usually) --- RCD --- MCBs..
Putting a switch before the meter wouldn't be desirable from the power company perspective. You could isolate the meter, bypass it and turn the power back on!
A tad over specified but no shortage of ways of isolating it !
[This message has been edited by djk (edited 05-13-2003).]
djk, I wouldn't say this system is over-specified, we use the same system here in NZ, except that the fuse is usually an HRC BS 88 type in a PoCo sealed Pillar box (or up on a pole in an O/H installation). The main switch, does not isolate the Metering equipment over here either, as only Authorised people have access to them. Them cards on the meter-seals give a pretty good warning about tampering with the meters, We could do with having the same sort of cards over here!.