Operating Height For Panels

Acceptable? Your client's standards will tell you that.

Panel heights often vary a lot from one end to the other:- especially if the fence is built on a slope:-

Sorry: I know this is not what you're talking about, but, its as good a guess as anyone could make from the lack of context in your question.

What exactly are you talking about?

The regs that apply depend on your location.

Here's an example: http://www.schneider-electric.us/en/faqs/FA129108/

If you live in the land of giants, yes.

If you live in the land of munchkins, no.

Maybe, if you stated where on earth you are, someone here could point you in the right direction.

YouTube four candles?

Why do you specify the operating height upto 1800 mm?

It is your job to know this and your job to determine if deviations are acceptable.

Do your job.

The rules generally deal with accessibility to switches, how high an average person can reach to operate the switch without assistance ....1900mm seems reasonable to me...

I am going to say this: Electrical control panels such as breaker cabinets require a specific volume internal to the cabinet for the energy release possible during an arc over event during breaker opening. Perhaps the specific energy of your circuits requires a taller "panel" in this instance to fit into arc flash guidelines for safety reasons.

Other than that, if the short guy cannot reach the switch, provide them with a short step ladder.

Or provide him another short guy and together they might equal one tall guy.

Well then it all sort of makes sense once again.

I assume the 1800mm is to mid point, not the bottom. I know of space requirements in front, above and below, but not of a height requirement.

We mount panels so, if there is a main disconnect or an HMI, the average person can find it comfortable to use, and yes, we take into account what "average height" is where it is going and mount Chinese enclosures a bit lower than one staying in America.

I can tell you that mounting low, even if there are no controls or displays on the door, will cause a complaint and require a remounting in the field. Due to space constraints on one skid, I mounted a terminal box for mustering instrument signals at a height that was easy to work on while seated. Union electricians don't like this - they want to stand to do their work, even on class II voltage circuitry. We had to do some fancy field work to get that panel up to where they could stand to work in it.

I believe as per the NEMA standards the maxmimum height is about 2100mm. The Panels we made at Saudi were at most 2200mm but that is very rare... Besides the reason is that the operator would need a ladder to operate the panel