The OSHA Electrical Standard 1910.303(b) requires you to keep electrical equipment “free from recognized hazards likely to cause death or serious physical harm” to workers. To comply, you must evaluate not just the actual equipment but electrical connections and circuits. Here are the 9 things OSHA says you have to check:
1. Devices & Conductors Made of Different Metals
The different physical characteristics of dissimilar metals can create hazards that you need to guard against. Specifically, there are 3 things to check:
2. Conductor to Terminal Parts Connections
Connections of conductors to terminal parts must ensure a good connection that doesn’t damage the conductors via pressure connectors (including set-screw type), solder lugs, or splices to flexible leads. (No. 10 or smaller conductors may be connected via wire binding screws or studs and nuts that have upturned lugs or equivalent.)
3. Identification of Particular Terminals
Make sure any terminals for more than one conductor are identified as such. Ditto for terminals used to connect aluminum.
4. Splices & Joinings
5. Isolation of Electrical Equipment from Combustibles
Parts of electric equipment that in ordinary operation produce arcs, sparks, flames or molten metal must be enclosed or separated and isolated from combustible materials.
6. Marking of Electric Equipment
Make sure electric equipment is marked with:
Markings must be durable enough to withstand the environment in which the equipment is used.
7. Marking of Disconnecting Means & Circuits
Again, these markings must be durable enough to withstand the work environment.
8. Locking Capacity of Disconnecting Means
Make sure the disconnecting means can be locked in the open position.
9. Markings of Equipment Used in Combination with Each Other
Verify that use of circuit breakers or fuses complies with the series combination ratings marked on the equipment by the manufacturer. Equipment enclosures must be marked in the field to indicate such compliance with a legible marking that’s readily visible and states:
“Caution — Series Combination System Rated_____Amperes. Identified Replacement Component Required.”
Go to the SafetySmart Compliance Electricity Compliance Center to get more help complying with OSHA electrical safety requirements: