Electric cable should never be over under - over over clockwise only. DMX cable depends on the best boy.

You always know which stinger came back from the camera department.

HMI spike is only true of lights with a magnetic ballast. HMIs with electronic ballasts actually ramp up to their true voltage (which may be higher than you would think).

In the link below there is a plate from a 1200w HMI ballast. The Pmax is what you have to worry about as that is volt-amps apparent load, which is a function of the load plus the power factor (without getting to in depth, power factor tells us how much extra power is required to run a light.). The Pmax is 2290 meaning at 120V, 2290/120=19Amps. You're not going to get anything else on that 20A circut, and can't run it on a 15A circuit. If you run stingers to it, your voltage may drop as well, which could make it not even run on a 20A circuit.

If your ballast is electronic power factor corrected (it won't always be, check when you're renting), most likely the Pmax will be lower.

http://www.screenlightandgrip.com/images/generators/ArriEBL1200_Ballast_...