Ref: 424.19 (A) (2) (2002 NEC) disconnecting means
Ref: 424.19 (A) (2) (2002 NEC) disconnecting means
Referring to 424.19 (A) (2),
"2) Heater Containing a Motor(s) Rated Over 1/8 Horsepower. The above disconnecting means shall be permitted to serve as the required disconnecting means for both the motor controller(s) and heater by one of the means specified in items (1) through (4):
(1) Where the disconnecting means is also in sight from the motor controller(s) and the heater.
(2) Where the disconnecting means is not within sight from the heater, a separate disconnecting means shall be installed, or the disconnecting means shall be capable of being locked in the open position, or unit switches complying with 424.19(C) shall be permitted.
(3) Where the disconnecting means is not within sight from the motor controller location, a disconnecting means complying with 430.102 shall be provided.
(4) Where the motor is not in sight from the motor controller location, 430.102(B) shall apply. "
INTERPRETATION IS THAT A LOCKOUT COULD BE UTILIZED FOR THE HEAT, BUT IF YOU LOOK AT 430.102 THE LOCK OUT COULD NOT SERVE AS THE DISCONNECT FOR THE MOTOR CONTROLLER (CONTACTOR) BECAUSE THE EXCEPTIONS (A) & (B) ARE NOT MET {MOST MUNICIPALITIES DO NOT REQUIRE QUALIFIED INDIVIDUALS ON THE JOB)