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62 votes
Accepted

Where can I get a cover for a main supply?

Some important UK context is missing from the other answers. In the UK this is know as the "Service Head" or main cut-out. It is the responsibility of the local Distribution Network Operator ...
Engineer Green's user avatar
42 votes

Need to understand my home electrical meter to see why bill is so high and/or if neighbor is on same meter

They're kilowatt-hours. If you use 1000 watts for 1 hour, it'll add one to the current number displayed. It's like an odometer on your car. It only counts up, and will never be at 0 except when it ...
Dotes's user avatar
  • 4,829
26 votes

Need to understand my home electrical meter to see why bill is so high and/or if neighbor is on same meter

Dotes's suggestion for detecting whether any of your circuit breakers serves equipment for the neighbors is a good one. There's a web page which describes how to read instantaneous current through an ...
Greg Hill's user avatar
  • 31.6k
25 votes
Accepted

How is my analog electric meter being read?

Your meter is a General Electric watthour meter type I-70-S catalog # 720X70G1 with the optional pointer register. It is fitted with an electronic circuit board mounted inside the housing to enable ...
A. I. Breveleri's user avatar
23 votes

Would an old bad main meter panel wear out a newer panel and breakers in house?

Call your power company and report an outage There's a logical hazard called "target fixation". You are focused on panel and breakers, because you have deemed the existing panel to be "...
Harper - Reinstate Monica's user avatar
21 votes

How is my analog electric meter being read?

We regularly see a car, clearly marked as being from the utility company with antennas all over it. Your meter likely has a pulse counter with a radio transmitter connected to it that those antennas ...
LShaver's user avatar
  • 1,316
14 votes

Need to understand my home electrical meter to see why bill is so high and/or if neighbor is on same meter

Find your breaker panel and turn off every breaker (except the main). The meter should register no increase even after an hour. If it is still counting up, you have a problem. Turn on one breaker and ...
JRaef's user avatar
  • 15k
14 votes
Accepted

Using an Ohm Meter to test for bonding of a subpanel

The panel looks beautiful, except for one problem. You are 100% correct. Because neutral and ground are bonded in the main panel (whether that is a regular big panel or a small panel/disconnect at the ...
manassehkatz-Moving 2 Codidact's user avatar
13 votes

Need to understand my home electrical meter to see why bill is so high and/or if neighbor is on same meter

The first thing I would suggest is to carefully read your monthly bill. There should be a place where it tells you last month's reading and this month's reading; the difference between the two are ...
ArmanX's user avatar
  • 598
13 votes

Electric Meter Runs Backwards

Put the meter in upside down. If that works, then you can reverse the wiring or live with an upside down meter. Also, since the meter is just for your own use, running backwards is fine. The math is ...
longneck's user avatar
  • 21.3k
13 votes
Accepted

How do I read *instant* wattage draw from my spinning-disc electric meter?

Yes. You can determine your instant watts or kilowatts by using a stopwatch to time how long the disc takes to go around. Then you need to do a little bit of math. Not too much, promise :) First,...
Harper - Reinstate Monica's user avatar
13 votes
Accepted

Design review request for 200amp meter upgrade

Research first. Then buy. Harper's corollary: Buy the wire LAST. Fire your purchasing agent. In fact, don't have your new guy purchase anything until the research is complete. I bought this Siemens ...
Harper - Reinstate Monica's user avatar
10 votes
Accepted

Electrical design for a house with an ADU, solar, and backup generator

Accessory dwelling units are complicated While outbuilding feeders and standby generators are both common things to have -- your combination of having an accessory dwelling unit in the outbuilding ...
ThreePhaseEel's user avatar
9 votes

Are unions considered harmful to plumbing?

The IFGC doesn't allow unions in concealed spaces because of their leaking proneness. See the IFGC's 404.5 commentary. You're right to try avoiding their use, but you're not describing a concealed ...
popham's user avatar
  • 10.5k
8 votes

How can a "class 320" service legaly/safely supply two 200 amp panels?

Continuous vs. Peak ratings The discrepancy you are seeing here is a function of the difference between the way meters and sockets are rated and the way breakers and panels are rated. In particular, ...
ThreePhaseEel's user avatar
7 votes

Why is my water main pipe curved at the meter

Two reasons come to mind. First, the bend allows for some longitudinal expansion and contraction of the pipe to be accommodated. Sort of like the serpentine routing of the Alaskan pipeline. Picture ...
SteveSh's user avatar
  • 6,912
6 votes

Need to understand my home electrical meter to see why bill is so high and/or if neighbor is on same meter

It looks like other answers so far have given good tips, but haven't answered the question "How to read the meter" very well. You could measure the power usage like this: Take a note of the current ...
jpa's user avatar
  • 1,767
6 votes

What is required to raise my electric meter?

You'll probably want an electrician for this. There's some major reasons why Most utilities do not provide you a meter box. They will happily run wire to a meter box and stick a meter in for you, but ...
Machavity's user avatar
  • 25.4k
5 votes

What happens if CT ratio entered wrong in 3phase meter

If your meter is assuming one ratio, and it's actually a different ratio, then the meter will read incorrectly.
Neil_UK's user avatar
  • 583
5 votes

Would an old bad main meter panel wear out a newer panel and breakers in house?

Sounds like you have some bad connections. That won't "wear out" or "disable tripping" on the newer panel. It might burn your house down, though. "Half the house lost power&...
Ecnerwal's user avatar
  • 221k
5 votes

electric meter move advice

Things vary according to location but around here, you contact the local power company and request a temporary pole and disconnection of your current service. Once that is done, you can complete your ...
jwh20's user avatar
  • 23.4k
5 votes

Design review request for 200amp meter upgrade

Please confirm this specific box was on a list from PGE or specifically approved by them in some way, preferably not just verbally. Each utility has particular meter panels that they approve. The ...
manassehkatz-Moving 2 Codidact's user avatar
5 votes

Why would each leg suddenly read 240 volts power drop in part of my house every 5-10 minutes?

crip659 has it. It's a lost neutral, combined with a lack of competent ground rods. Due to gross disrepair and lack of maintenance, which is on you because you agreed to do it. The Lost Neutral part:...
Harper - Reinstate Monica's user avatar
5 votes

Are unions considered harmful to plumbing?

Unions are fine. You see them in plumbing work all the time. It's impossible to plumb some items without a union. What you want to avoid is unnecessary unions. If there's a way to plumb it with fewer ...
KMJ's user avatar
  • 12.2k
4 votes

Electrical design for a house with an ADU, solar, and backup generator

It's the normal situation in most homes to have "just a meter" outside, and then have a short service cable from the meter to the main service panel inside. The service cable is completely ...
Harper - Reinstate Monica's user avatar
4 votes

Is it a good idea to insulate exterior steel gas pipes?

The temperature at which methane liquefies is around -258°F (-161°C), and it doesn't freeze until -296°F (-182°C). If it's cold enough to freeze the gas in your pipes, you have bigger things to worry ...
Simon B's user avatar
  • 4,058
4 votes

How can a "class 320" service legaly/safely supply two 200 amp panels?

I think you made an understandable leap of logic, that has nonetheless misled you. You heard about "class 320" service, and misinferred that this meant "320A service". No, ever since I heard about ...
Harper - Reinstate Monica's user avatar
4 votes

One meter (200A service) feeding two main electric panels 100A ea, is it legal?

Your problem isn't only "two load centers on one meter", its "two wires in one lug that's not tested for such use" While having multiple service panels fed in parallel from a ...
ThreePhaseEel's user avatar
4 votes

Is there a missing ground wire in my pedestal service circuit?

You are being written up for a missing Equipment Grounding Conductor (EGC) which is the ground wire that goes with hots and neutrals in every circuit or feeder. The thing between this meter-main and ...
Harper - Reinstate Monica's user avatar
4 votes
Accepted

Openings in 3 phase distribution box cover?

Must be approved NEC 110.2 is specific on this: the items must be approved for use. Literally it means by the local inspector (which gives the inspector latitude/flex), however with the country awash ...
Harper - Reinstate Monica's user avatar

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