Where should transformers be placed?
Transformers should be located at least 12 in. to 18 in. away from walls and other obstructions that might prevent free circulation of air through and around each unit, unless the unit is designed for wall mounting and installed per the manufacturer.
How far does a transformer have to be from a building?
Generally, a transformer located near a building requires 4ft clearance from the building vertical surfaces, assuming no windows from grade to 18ft.
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).
Are Askarel insulated transformers are permitted to be installed outdoors only?
Askarel has been banned by the Environmental Protection Agency and its use as a transformer coolant is being phased out. All transformers are required to be insulated. Transformers are required to be installed outdoors only.
Is it bad to live next to a transformer?
Transformer substations located close to the living areas could induce high long-term exposures to extremely low frequency magnetic fields of nearby inhabitants. Some of the researches have shown increased risk to childhood leukemia associated with the long term exposure to the elevated levels of magnetic fields.
Do transformers require work clearance?
The National Electrical Code Section 110.26 (A) Working Space states in part, “Working space for equipment operating at 600 volts, nominal, or less to ground and likely to require examination, adjustment, servicing, or maintenance while energized.” Transformers are not meant to be worked on while energized, therefore …
What are minimum distance from transformer to house?
Fire services officials said that as per the hazard area stipulation in the Petroleum Act, transformers should be at least nine metres away from a building.
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 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.
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 is the minimum distance between dry type transformers?
Energy Efficient (EE Type) Ventilated Dry Type Transformers must be installed so that a minimum of 3 inches clearance is available between a ventilation opening and any wall or other obstructions.