3 phase converter betweeen panels?

Status
Not open for further replies.
E

ExcavatorBoy

Member
Location
Kingston, WA
I have a customer with a woodworking shop. He went to an auction and purchased several three phase tools. Now he wants three phase power for those tools.

There is no three phase power available at his site.

His idea is to have me install a large rotary converter off of his single phase panel to feed a three phase panel. The way I read the code I should do separate converter for each machine straight from the single phase panel.

Can one of you who is more of a code guru help me out here? I want to be able to quote section and verse to the inspector.

Thanks!

Bob
 
What code section makes you think you need a separate converter for each piece of equipment? I can't think of anything off hand that would prevent you from using one converter to run several pieces of equipment.

If it is a one man shop - I don't even see anything wrong with sizing the converter for the largest piece of equipment as long as he is willing to only run one machine at a time.

Just make sure the service and feeders are sized large enough. I assume you know that you will have a lot more current on the single phase side than on the three phase side. (A 10 amp three phase motor might draw about 20 amps from a single phase service, for example).
 
You can either feed a 3-phase sub-panel through the inverter, or run a single 3-phase circuit to several outlets from the converter.
 
Status
Not open for further replies.
Top