Intermittent Duty


Electrical Code

Intermittent Duty

Operation for alternate intervals of (1) load and no load; or (2) load and rest; or (3) load, no load, and rest.

Continuous Duty

Operation at a substantially constant load for an indefinitely long time.

Periodic Duty

Intermittent operation in which the load conditions are regularly recurrent.

Short-Time Duty

Operation at a substantially constant load for a short and definite, specified time.

Varying Duty

Operation at loads, and for intervals of time, both of which may be subject to wide variation.

(National Electrical Code® 100-1)