The specified system shall be designed, manufactured, and tested in compliance with UL 67 standards.
The system shall safely withstand without misoperation or damage:

• Transient voltage surges on the AC power input as defined by ANSI/IEEE C62.41 for Category B3 locations (high surge exposure industrial and commercial facilities),
• Electrostatic discharges (ESD) up to 10 kV at any point on the exterior of the unit, and
• Electromagnetic fields from portable transmitters within 3 feet (1 meter) of the unit.

Input/Output voltage shall be ((208/120), (240,120)) volts AC, ((60)) Hz, three-phase, four-wire-plus-ground or single phase, three-wire-plus-ground.

Storage temperature range shall be -55 to +85°C (-67 to +185°F).
Operating temperature range shall be 0 to 40°C (+32 to 104°F).
Operation shall be reliable in an environment with 0% to 95% noncondensing relative humidity.
The audible noise level of the specified system shall be less than 45dBA.

Wiring diagrams and drawings of major components shall be furnished.

A list of recommended spare parts shall be supplied at the customer’s request.

An in service user’s list shall be furnished upon request.

The manufacturer shall provide a one-year warranty against defects in material and workmanship for 12 months after initial start-up or 18 months after ship date, whichever occurs first. (Refer to the Warranty Statement for details.)

The specified system shall be factory tested before shipment. Testing shall include, but shall not be limited to: Quality Control Checks, “Hi Pot” Test, two times rated voltage plus 1000 volts, per UL requirements (Metering Calibration Tests), and load test of individual receptacles within the unit.

The frame shall be constructed of steel and pop riveted and/or welded to provide a strong substructure. The cabinet shall be a rack mountable NEMA type 1 enclosure and meet IP20 requirements.The unit shall have lockable doors. A minimum of 32 cable/conduit openings shall be provided in addition to 16 each output receptacles within the enclosure. All service shall be capable of being performed with access to the front and rear. Retrofitting additional power distribution cables shall require access to the front or rear of the unit only. A tool shall be required to remove the exterior panels that access the hazardous voltage area of the unit. Doors shall provide access to the main panel board circuit breakers and to all output circuit breakers. The color of the exterior doors and panels shall be manufacturer’s standard color.

The unit shall be naturally convection-cooled. No fans for forced-air cooling system shall be used. The convection cooling method shall allow continuous full-load operation. Heat rejection shall be through a screened protective side openings that prohibits entry of foreign material.

The cabinet dimensions shall be a maximum of 17.5 in Wide by 17.5 in. High by 15 in. deep for the 24 circuit RPDU and 17.5 in Wide by 30 in. High by 15 in. deep for the 42 circuit RPDU. The distributed weight shall be less than 70 lbs for the 24 circuit RPDU and 110 lbs for the 42 circuit RPDU.

(Input power conductors shall connect to the main panel board circuit breakers or terminal blocks. Power terminals shall be provided for connection of a 150% rated neutral (1/O power cable, and ground.) (A Main Input power terminal blocks shall be provided for connection of the input power conductors, 150% rated neutral, and ground.)

The specified system shall contain one vertically mounted panel board for distribution to the intended receptacles and/or loads. The panel board shall be accessed from the front of the unit. The panel board shall be totally enclosed with a removable accent panel that provides access to that panel board without exposing other portions of the unit. The accent panel shall properly fit over the branch breakers. The panel board shall have a rating of minimum 125 amperes, with an overall short-circuit current rating of 10,000 RMS symmetrical amperes. The panel board shall provide a total of (39) single-pole branch circuit breaker positions for the 42 circuit RPDU and a total of (21) single-pole branch circuit breaker positions for the 24 circuit RPDU. The panel board shall include separate isolated neutral and safety-ground bus bars for the neutral and safety-ground connections for at least 42 output circuits for the 42 circuit RPDU and at least 24 output circuits for the 24 circuit RPDU. The neutral bus bar shall be sized for at least 1.50 times the panel board full load rating to accommodate high harmonic neutral currents associated with single-phase nonlinear loads.

Each load circuit shall be protected by an individual branch circuit breaker. Single-pole, two-pole, and three-pole [(plug-in) (bolt-on)] type branch breakers up through 100 amperes shall be utilized. Each branch circuit breaker shall provide over current protection and shall clearly indicate the “ON”, “OFF”, and “TRIPPED” positions. All branch circuit breakers shall have a minimum interrupting capacity of [(10,000) (6,000)] RMS symmetrical amperes at [(120/208) (120/240)] VAC. Each branch circuit breaker shall be sized in accordance with the NEC and shall be UL listed. Branch circuit breakers shall have an associated directory label identifying the branch circuit number and the equipment being served.

The output of each circuit is internally wired to a dedicated receptacle on the back of the RPDU. The cable supplying each remote load shall consist of UL/CSA listed liquid-tight flexible metal conduit containing the required THHN copper insulated power, neutral, and parity-sized ground conductors. The flexible conduit shall be liquid-tight, insulated, and shielded to minimize electrical or mechanical disturbances to the conductors. The length of each cable and the type of receptacle/termination shall be as specified on the detailed cable schedule. Each output distribution cable shall be permanently labeled at each end of the cable with the assigned circuit number and receptacle type, equipment identification, and cable length. Each cable shall be thoroughly factory-checked and factory-tested. Tests shall include continuity, phase rotation and a Hi Pot test at twice rated circuit voltage plus 1000 volts. All output cables can be wound on spools mounted on casters to facilitate handling and installation. Each cable shall be a UL listed assembly.

The current monitoring panel shall consist of a 4 digit high visibility Liquid Crystal Display (LCD) to monitor current parameters. Front and rear LCD’s shall be provided for operator interface. The three phase or single phase currents for the RPDU shall be displayed. The display shall be accessible without opening the door. All currents shall be monitored using true RMS measurements for accurate representation of non-sinusoidal waveforms typical of computers and other sensitive loads.

The enclosure shall be provided doors that allow the operator to access the main and branch breakers.

Plug-in main panel board circuit breakers shall be provided to allow easy replacement.

Heavy-duty solid wood crating shall be provided to meet international requirements regarding package strength and special markings for overseas shipments.