X-ray machine power/wiring requirement

[Sailor53]

I am designing the electrical system for a veterinary clinic. The clinic includes one x-ray machine. I don't know the particular model # the owner will use, but a sample unit found on the internet requires 70A, 208-240V, 1-phase. Are there any standard practices I should be aware of such as oversize feeders or dedicated transformers?

Steve

 

[skiier]

If u r in Ontario chaeck Section 52 of the Ontario Electrical Safety Code.

 

[dpc]

See NEC Article 517 Part V. It's for health care facilities but it probably applies.

You're really going to need to know what machine is being put in to do the electrical design.

"Theory is when you know all and nothing works. Practice is when all works and nobody knows why. In this case we have put together theory and practice: nothing works... and nobody knows why! (Albert Einstein)

 

[EEJaime]

X-ray machines vary WIDELY from one manufacturer to the next, as do all imaging systems. Don't get caught guessing. Insist that the owner provide you with specific equipment specifications or if that is absolutely not possible, I would put in an empty conduit, a junction box and leave space in the panelboard for a large breaker and let him know that the breaker, conductors, outlet or disconnect switch will be specified when the equipment is submitted on or purchased. Put in an allowance for the cost and pay the contractor the difference if it is not sufficient.

X-ray loads are truly intermittant loads. It is a low level load until the image is taken at which time the load spikes for a few cycles or seconds. Usually not enough time to heat up the conductors unless seriously undersized, but enough to trip instantaneous settings on breakers if too closely sized.

Good luck,
EEJaime