Electrical Safety: Signage
Signs provide information regarding a potential electrical shock hazard. They are also used to display information regarding operation and/or maintenance details. The basic requirement for signs are as follows:
- The sign shall be made of a durable material consistent with the anticipated environmental conditions and expected length of exposure.
- The color and shape of the sign shall be consistent with regulatory requirements.
- The lettering shall be large, highly visible, and easily seen in darkened, low light situations.
- Signs of warning/information are required at the following locations:
- Electrical equipment that has unusual safety risks or is not typical of the location’s electrical systems.
- On all doors to switchgear facilities, control houses and electrical rooms.
- Where a low voltage bus is supplied from two or more sources creating a backfeed opportunity to the low voltage supply system
- If temporary alterations made to the low voltage supply system may backfeed the low voltage supply system.
- All equipment and devices shall be properly identified with easy-to-read lettering.