Transformers

[richardrtt]

1. Can you mount (nut and bolt) brackets to the top of transformer to support an electrical panel or any other devices?
2. Can you mount a diconnect direct to a tranformer?

 

[wbalsam1]

1. Can you mount (nut and bolt) brackets to the top of transformer to support an electrical panel or any other devices?
2. Can you mount a diconnect direct to a tranformer?

Would this have the effect of voiding the listing/labeling?

 

[earshavewalls]

It sounds like you're talking about temporary power for a large facility. I have seen this done on rolling platforms at mall construction sites where the disconnect, transformer, and panel, as well as several receptacles of both 120v and 240v have been mounted together on the wooden structure with caster wheels to allow moving the temp power around (limited to SER feeding....remember this is for temp power).
We never mounted any of the equipment physically ON the other equipment. We always had a separate location. This is a good idea in case you need to replace any of the equipment. I do not think that any of the equipment you have mentioned has been listed to be a support structure for the other equipment.
Good question, tho.

 

[celtic]

1. Can you mount (nut and bolt) brackets to the top of transformer to support an electrical panel or any other devices?

Heat rises...I think this would be a less than desirable installation.

2. Can you mount a diconnect direct to a tranformer?

Kind of defeats the purpose of the disconnect, no?
IF the transformer was ever in need of service/replacement you disconnect is basically rendered useless.

 

[infinity]

Kind of defeats the purpose of the disconnect, no?
IF the transformer was ever in need of service/replacement you disconnect is basically rendered useless.

If you ever look at the ceiling hung transformers at Big Orange or Lowe's they almost always have the load side disconnect mounted to the side of the transformer.

 

[barbeer]

read 110.13 for your 1st question.

 

[celtic]

If you ever look at the ceiling hung transformers at Big Orange or Lowe's they almost always have the load side disconnect mounted to the side of the transformer.

I'll have to eyeball one next time I venture into Hades.

Don't you think this type of install is self-defeating?
The only difference in only is a few anchors vs. the nuts and bolts...isn't a pipe on the wall with flex to the disco?

 

[donselectric]

never did that and nerver will
its amazing what a 3/8 nut and washer
will do to a perfectly good tranformer
ues powerstrut and mount beside it

 

[Chris6245]

Had no choice when we changed a 75Kva T-former out with a 150Kva. We had no way of installing a 200 amp breaker in any panel and to keep the working space we had to mount the disco on the side of the T-former. Used unistrut from the ground up and attached the top to the lift bolts on top of the T-former for support. Before we did this we called the inspector for a consult and he had no problem with it. Of course the load side of the disco can be taken loose and the chase nipple removed and 2 bolts at the top and the T-former is free to be removed. We used "L" brackets to the floor on the unistrut.

 

[chris kennedy]

Kind of defeats the purpose of the disconnect, no?
IF the transformer was ever in need of service/replacement you disconnect is basically rendered useless.

440.14. "The disconnecting means shall be permitted to be installed on or within the air-conditioning or refrigeration equipment.

Off topic a bit but
I never liked this one.

 

[celtic]

The rest of the article helps...

The disconnecting means shall not be located on panels that are designed to allow access to the air-conditioning or refrigeration equipment.

...at least it gives the user some direction (albeit common sense).
(While "off-topic", I see it as somewhat relevant)

In the situation of a transformer, IMO, there are a few more options in play...heat radiating from the unit, loose disco mounting hardware falling across live parts, etc.

Mounting ON a transformer is just an installation that I am not particularly fond of...barring any concrete references to prevent such installations ~ to each his own.