jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
120/480v meter
- Thread starter Hfalz1
- Start date
- Status
Hfalz1
Member
- Location
- Houston, Tx.
- Occupation
- Electrician
panel
panel
What type of panel would work for this? 120/240V? 3 phase?
panel
What type of panel would work for this? 120/240V? 3 phase?
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Sure hope so, that is exactly what we concluded we have here.
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
It depends on whether or not you have three phase 240V loads. If not, just ignore the high leg and treat it like 240/120 split phase with L1 L2 N G buses. There's no reason to have the high leg in your panel if you aren't using it, and if it's in there there is the possibility of connecting a 208V leg to a 120V load.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
We don't really know OP's intentions, but if not planning to utilize the high leg at all, may want to have the service agreement with POCO changed to single phase, probably a lesser monthly charge for single phase service then three phase. They would likely change the meter to a single phase only meter, but those will still plug into three phase meter socket, they just don't use the center pole of the socket, which may require changing connections there if the high leg is currently in the right position (pretty common).
meternerd
Senior Member
- Location
- Athol, ID
- Occupation
- retired water & electric utility electrician, meter/relay tech
Meter Form
Meter Form
With electro-mechanical meters, you would be able to tell what kind of service by looking at the meter nameplate to see what it's designed for. V is rated Voltage, FM is Form (which is the type of service), S means Socket base, CL is the continuous Amp rating. Self-contained (no CT's) are CL200, 320, etc. CT rated are CL20. With solid state meters, most will work for various types of service and electronically "adjust" for what voltage/phase relationships they sense. Problem is, they don't display what kind of service it is. 120-480 on the nameplate means only rated voltage. The same meter would work for 208/120 or 480/277. Throw in PT's for higher voltages and it can get hairy. I won't even go there. I guess after all that useless information is said, without at least doing a voltage check, it's pretty tough to tell, especially on underground where the transformer nameplate is behind a locked cover. I wonder if I'll ever be retired long enough to forget all this stuff!:happysad:
Meter Form
With electro-mechanical meters, you would be able to tell what kind of service by looking at the meter nameplate to see what it's designed for. V is rated Voltage, FM is Form (which is the type of service), S means Socket base, CL is the continuous Amp rating. Self-contained (no CT's) are CL200, 320, etc. CT rated are CL20. With solid state meters, most will work for various types of service and electronically "adjust" for what voltage/phase relationships they sense. Problem is, they don't display what kind of service it is. 120-480 on the nameplate means only rated voltage. The same meter would work for 208/120 or 480/277. Throw in PT's for higher voltages and it can get hairy. I won't even go there. I guess after all that useless information is said, without at least doing a voltage check, it's pretty tough to tell, especially on underground where the transformer nameplate is behind a locked cover. I wonder if I'll ever be retired long enough to forget all this stuff!:happysad:
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