How do you mount a transformer?
Remove the transformer from the wall. Drill bottom anchor holes and install the anchors. Place the transformer back on top of the uppermost mounting screw and install screws into the anchors at the bottom of the transformer to secure it to the wall.
Can you mount a transformer above a panel?
If the headroom below the transformer and above the required working space in front of the switchboard is 6 feet, 6 inches or more, then the transformer location is acceptable. The transformer does not intrude upon the dedicated space directly above the switchboard, as required by Sec. 110-26(f).
How do you suspend a transformer?
The main thing I got from it is the best and safest way to suspend a transformer from steel joists is to put the all thread between the chords and then plate washer double nut etc. the idea is that the load is on the top flange. Also keep within 10 inches of panel points.
Can you hang a 112.5 kVA transformer?
Dry-type transformers installed indoors that are over 112.5 kVA: According to the provisions in Section 450.21(B), dry-type transformers of more than 112.5 kVA must be installed in a transformer room of fire-resistant construction having a minimum fire rating of one hour (general rule). However, the Ex.
Do transformers need to be bolted down?
These units can be floor or platform mounted but must always be in a vertical position with the mounting feet down. The ventilating openings of this transformer must not be blocked or restricted in any way that will reduce the flow of air through the transformer.
How much clearance does a transformer need?
Generally, a transformer located near a building requires 4ft clearance from the building vertical surfaces, assuming no windows from grade to 18ft.
Can I mount a transformer in a wall?
Check your transformer’s mounting holes. If they’re for wall mounting, mount the unit on a wall. If they’re for floor mounting, mount the unit on the floor. … Connect the transformer to a building member strong enough to absorb the earthquake loads predicted for your zone rating.
Does a transformer need a housekeeping pad?
Housekeeping pads are a very workmanlike procedure and in my opinion should be included in every floor-mounted installation of dry-type transformers but this is not a safety oriented requirement and is not a requirement of the NEC.
Can you mount a transformer sideways?
No You cannot. The enclosure is oriented to protect from the weather and the core is not mounted in such a way that sideways mounting is structurally supported. IE if you mount it sideways the core will likely shift inside the enclosure and fail.
What is a class 155 transformer?
Transformers with Class 155 or higher insulation systems separated by a fire-resistant heat-insulating barrier or by not less than 6 feet horizontally and 12 feet vertically. Transformers with Class 155 or higher insulation systems completely enclosed except for ventilating openings.
Are dry type transformers 1000 volts or less required to be readily accessible?
Accessibility. Transformers must be readily accessible to qualified personnel for inspection and maintenance [450.13]; however, you don’t need to make dry-type transformers readily accessible, if you locate them: In the open on walls, columns, or structures (Fig. 1).
What type of transformer must be installed in a vault?
Any askarel-insulated transformer rated over 35,000 volts must be installed in a vault. Many transformers are cooled and insulated with a special insulating oil.