Contact with transformers occurs less often then with motors; however,
transformers still pose a serious shock and fire hazard. The requirements below apply to
most transformers. To prevent accidents, follow these requirements:
- The operating voltage of exposed live parts of transformer installations shall be
indicated by warning signs or visible markings on the equipment or structure
- Dry-type, high fire point liquid-insulated, and askarel-insulated transformers installed
indoors and rated over 35 kV shall be in
a vault
- Oil-insulated transformers installed indoors shall be in a vault if they present a fire
hazard to employees
- Combustible material, combustible buildings along with parts of buildings, fire escapes,
and door and window openings shall be safeguarded from fires which may originate in
attached or adjacent oil-insulated transformers
- Transformer vaults shall be constructed so as to contain fire and combustible
liquids within the vault and to prevent unauthorized access. Locks and latches shall
be so arranged that a vault door can be readily opened from the inside
- Any pipe or duct system foreign to the vault installation may not enter or pass through
a transformer vault
- Materials may not be stored in transformer vaults.
|
