Location of Pad Mount transformers

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KasseemF

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I would like to know if there is any regulation for the distance of a pad mount transformer from a building?

should a power suppliers transformer be installed within feet of the consumers switchgear?

What issues should be taken into sonsiderration with the installation of transformer that steps down directly to a consumers switchgear?
 
I would check with the Utility company first, to see if they do not have any restrictions.

Then the building department (local jurisdiction) may have other considerations as well.


"What issues should be taken into sonsiderration with the installation of transformer that steps down directly to a consumers switchgear? "

You need to take into consideration the amount of fault current that will be available to the equipment as supplied by the utility transformer.
 
In the United States, generally the serving electric utility has their own standards based on the requirements of the National Electrical Safety Code. The following is from the NESC Rule 152A and different electric utilities will interpret the NESC in different ways:

1. Power transformers and regulators shall be so installed that all energized parts are enclosed or guarded so as to limit the likelihood of inadvertent contact, or the energized parts shall be physically isolated in accordance with Rule 124. The case shall be effectively grounded or guarded.

2. The installation of liquid-filled transformers shall utilize one or more of the following methods to minimize fire hazards. The method to be applied shall be according to the degree of the fire hazard. Recognized methods are the use of less flammable liquids, space separation, fire resistant barriers, automatic extinguishing systems, absorption beds, and enclosures.​

The amount and characteristics of liquid contained should be considered in the selection of space separation, fire-resistant barriers, automatic extinguishing systems, absorption beds, and enclosures that confine the liquid of a ruptured transformer tank, all of which are recognized as safeguards.​
 
Overating conductors?

Overating conductors?

Can service or feeder conductors be overated for any overcurrent device?

For example is it fine to install a 400MCM conductor for a 200A service?
 
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