I'm betting the building is wired for 3-phase power if it was once a machine shop.
Not sure what effect that will have on HID/if you can run HID on such a set up. Have you investigated the power supply?
Is anyone here a Sparky that can comment on 3-phase/compatability/etc???
s h
While there is nothing wrong with 12/240 v single phase systems (residential/light commercial). If you have a 3 phase system you are in excellent shape electrically speaking!
3 Phase in an industrial application can come in at the meter in either 120/208 WYE which means it has a Neutral (primary return to earth path), Ground (this is the mechanical ground wire that is secondary protection to earth and bonds the metal housings of all electrical equipment) and 3 'hots'. The hots will measure 120 v to neutral/ground and 208 v phase to phase.
The other system you'll find is a 277/480 v DELTA system and if you have a large machine shop or mfg facility this is the most desirable. This system allows smaller wires to be run since the current carrying capacity is met with the higher voltage thereby allowing smaller wires to carry the same current as the 120/208 3 ph systems allow.
voltage travels at 60 Hz or 60 cycles per second no matter what (in the USA). So by taking each of the 3 phases and moving them 120 degrees out of phase with the other phase (3 phases @ 120 degrees= 360 degrees - a full circle).
My point is that if you find yourself with a 3 phase service order as much equipment as you can in 3 phase. Especially motors and HVAC systems. They run FAR more efficiently and the loss of energy, as measured in power factor can be reduced for better more accurate metering.
I'll be happy to assist with any specific questions you might have with a particular installation.
Nationally there will be changes occurring very soon as to how we're going to be metered (have you had a new digital smart meter installed yet at your home or business?). The aim is to 'reduce our carbon footprints' and charge us based on time/date stamped usages with credits for efficiencies and self generated systems such as solar, wind and geothermal.
There is no question utility bills will be going up under these new programs.
There are some excellent ways to reduce costs and maintain yields that with the cost of fruit falling (at least in CA) everyone should be taking advantage of to cut those costs. 3 phase systems allow for greater efficiencies for the equipment that runs on them.