compressor is used. The locked-rotor current of each single-phase motor-compressor having a rated-load current of more than 9 amperes at 115 volts, or more than 4.5 amperes at 230 volts, and each polyphase

motor-compressor shall be marked on the motor- compressor nameplate. Where a thermal protector complying with 440.52(A)(2) and (B)(2) is used, the motor-compressor nameplate or the equipment nameplate shall be marked with the words "thermally protected." Where a protective system complying with
440.52(A)(4) and (B)(4) is used and is furnished with the
equipment, the equipment nameplate shall be marked with the words, "thermally protected system." Where a protective system complying with 440.52(A)(4) and (B)(4) is specified, the equipment name-plate shall be appropriately marked.

(B) Multimotor and Combination-Load Equipment

Multimotor and combination-load equipment shall be provided with a visible nameplate marked with the maker's name, the rating in volts, frequency and number of phases, minimum supply circuit conductor ampacity, the maximum rating of the branch-circuit short-circuit and ground-fault protective device, and the short-circuit current rating of the motor controllers or industrial control panel. The ampacity shall be calculated by using Part IV and counting all the motors and other loads that will be operated at the same time. The branch-circuit short-circuit and ground-fault pro- tective device rating shall not exceed the value calculated by using Part III. Multimotor or combination- load equipment for use on two or more circuits shall be marked with the above information for each circuit.

Exception No. 1: Multimotor and combination-load equipment that is suitable under the provisions of this article for connection to a single 15- or 20-ampere, 120- volt, or a 15-ampere, 208- or 240-volt, single-phase branch circuit shall be permitted to be marked as a single load.

Exception No. 2: The minimum supply circuit conductor ampacity and the maximum rating of the branch-circuit short-circuit and ground-fault protective device shall not be required to be marked on a room air conditioner complying with 440.62(A).

Exception No. 3: Multimotor and combination-load equipment used in one- and two-family dwellings, cord- and-attachment-plug-connected equipment, or equipment supplied from a branch circuit protected at

60 A or less shall not be required to be marked with a short-circuit current rating.

(C) Branch-Circuit Selection Current. A hermetic refrig erant motor-compressor, or equipment containing such acompressor, having a protection system that is approved for use with the motor-compressor that it protects and that permits continuous current in excess of the specified percent age of nameplate rated-load

current given in 440.52(B)(2)
or (B)(4) shall also be marked with a branch-circuit selec
tion current that complies with 440.52(B)(2) or (B)(4).
This marking shall be provided by the equipment
manufacturer and shall be on the nameplate(s) where
the rated-load cur rents) appears.

440.5 Marking on Controllers. A controller shall be marked with the manufacturer's name, trademark, or symbol; identifying designation; voltage; phase; full- load and locked-rotor current (or horsepower) rating; and such other data as may be needed to properly indicate the motor-compressor for which it is suitable.

440.6 Ampacity and Rating. The size of conductors for equipment covered by this article shall be selected