660 VHO questions

[Whaledriver]

How many 660 ballasts can I run on a 20 amp circuit? and how many on a 15 amp circuit? I will be running VHO bulbs

Can I run two 6 foot bulbs and a 4 foot bulb on a single 660/A4 ballast?

If I run two 6 foot bulbs only what would the amp draw be with a 660 ballast?

As always thanks for your help.

[IceCap Service]

If you have a 20 amp circuit plan on running no more than a 16amp load. You do not want to go over 80% of the rating of a circuit. On a 15 amp circuit plan on no more than 12 amps.

The max amp draw of the 660 is around 4.4 amps. It is higher for a brief instant at start up. So I would say you can easily run 3 660 ballasts on a 20 amp circuit with no problem.
As long as you do not exceed 16 total feet of lamp length for a 660 you will be fine.
I do not know the exact amp draw for 2 X 6 foot lamps but it will be slightly less than the 4.4 amp max.

[Whaledriver]

Thanks