Requirements for the Installation of volt and amp meter on panel door
- Thread starter yasir9399
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petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
I don't recall anything in the NEC that requires them.
It seems more like a design choice than a code requirement.
It also seems to me like a lot of switchboards and panelboards have power meters these days as people try to track down where all that electricity they are paying for is actually going.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
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- Electrical Contractor
I think there is a requirement for a hinged panel with devices attached to have an EGC jumper.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
UL508a requires a bonding wire if there are components on the door with voltages exceeding 30 V.
Interesting. Many/most of the systems I've experienced commonly have individual ammeters and one common voltmeter.
petersonra
Senior Member
- Location
- Northern illinois
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- engineer
pretty common here too, although these days with new equipment you are as likely to see a digital power meter.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
In the US, some locations mat require a permit and inspection. If this is a UL508A control panel, there could listing issues. For me as a end user, I would have to install UL listed parts, the panel meters and CTs are often component recognized for install by a panel shop.
If this is an electrical panel, breakers and such, seems like the 2020 NEC has language on power metering.
There is a requirement for wire space limits, 70%, and splices, 40%.
If this is an electrical panel, breakers and such, seems like the 2020 NEC has language on power metering.
There is a requirement for wire space limits, 70%, and splices, 40%.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
I suspect most of the time the meters come with the new equipment rather than being field installed. It is insanely expensive to field install anything these days.
With a panel meter you also need a switch for selecting a phase and wiring and at least CTs if not CTs and PTs. The major cost is the PTs. Most power meters need CTs but many go up to 600 V inputs so PTs aren’t typically required. You can buy a Shark 100 for instance for a couple hundred dollars...hard to compete with that with analog meters.
The poster above is from Pakistan. The voltage there is 230V, 50 Hz. I don't know the requirements there are UL, NEC, or IEC or something else. Perhaps he can clue us in...........
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Yes I saw that location.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
I gave an answer for the NEC.
NEC requires product listing. See article 100 definition.
I am not familar with IEC.
What type of panel is this?
NEC requires product listing. See article 100 definition.
I am not familar with IEC.
What type of panel is this?
It is a main distribution panel that is consisting of different capacity breakers.
The main reason behind knowing it. Most auditors came from abroad and they asked for specific standards or codes related to the installed material or design-related codes and I have reached out to the NEC 2020 but couldn't find the appropriate code for it.
winnie
Senior Member
- Location
- Springfield, MA, USA
- Occupation
- Electric motor research
Just to be clear: there is no requirement that panel meters be installed.
If as a customer choice panel meters are installed than a number of different requirements come into play, either in the NEC or in the listing rules. These requirements are discussed by others above.
Jon
If as a customer choice panel meters are installed than a number of different requirements come into play, either in the NEC or in the listing rules. These requirements are discussed by others above.
Jon
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