Article 409 Industrial Control Panels
Table 409.3 Other Articles
|Motors, motor circuits, and controllers||430|
|Air-conditioning and refrigerating equipment||440|
|Hazardous (classified) locations||500, 501, 502, 503, 504, 505|
|Commercial garages; aircraft hangars; motor fuel dispensing facilities; bulk storage plants; spray application, dipping, and coating processes; and inhalation anesthetizing locations||511, 513, 514, 515, 516, and 517 Part IV|
|Cranes and hoists||610|
|Electrically driven or controlled irrigation machines||675|
|Elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts||620|
|Resistors and reactors||470|
|Class 1, Class 2, and Class 3 remote-control, signaling, and power-limited circuits||725|
- An overcurrent protective device located ahead of the industrial control panel.
- A single main overcurrent protective device located within the industrial control panel. Where overcurrent protection is provided as part of the industrial control panel, the supply conductors shall be considered as either feeders or taps as covered by 240.21.
Exception: Where one or more instantaneous trip circuit breakers or motor short-circuit protectors are used for motor branch-circuit short-circuit and ground-fault protection as permitted by 430.52(C), the procedure specified above for determining the maximum rating of the protective device for the circuit supplying the industrial control panel shall apply with the following provision: For the purpose of the calculation, each instantaneous trip circuit breaker or motor short-circuit protector shall be assumed to have a rating not exceeding the maximum percentage of motor-full-load current permitted by Table 430.52 for the type of control panel supply circuit protective device employed.
Where no branch-circuit short-circuit and ground-fault protective device is provided with the industrial control panel for motor or combination of motor and non-motor loads, the rating or setting of the overcurrent protective device shall be based on 430.52 and 430.53, as applicable.
Where a grounded conductor is provided, the industrial control panel shall be provided with a main bonding jumper, sized in accordance with 250.28(D), for connecting the grounded conductor, on its supply side, to the industrial control panel equipment ground bus or equipment ground terminal.
- Manufacturer's name, trademark, or other descriptive marking by which the organization responsible for the product can be identified.
- Supply voltage, number of phases, frequency, and full-load current for each incoming supply circuit.
- Industrial control panels supplied by more than one electrical source where more than one disconnecting means is required to disconnect all circuits 50-volts or more within the control panel shall be marked to indicate that more than one disconnecting means is required to de-energize the equipment. The location of the means necessary to disconnect all circuits 50-volts or more shall be documented and available.
- Short-circuit current rating of the industrial control panel based on one of the following:
- Short-circuit current rating of a listed and labeled assembly
- Short-circuit current rating established utilizing an approved method
- If the industrial control panel is intended as service equipment, it shall be marked to identify' it as being suitable for use as service equipment.
- Electrical wiring diagram or the identification number of a separate electrical wiring diagram or a designation referenced in a separate wiring diagram.
- An enclosure type number shall be marked on the industrial control panel enclosure.