Recommended conductor sizes, Table for 40C

Recommended conductor sizes

Note: All wiring must comply with all applicable national and or local electrical codes.

Conductor sizing in this manual is based on Table 310-16 of the 2011 National Electrical Code (NEC) with the following assertions:

•90°C conductors (THHN) for 75°C termination

•3 Current Carrying Conductors for Unit Input Circuit Breaker and 4 Current Carrying Conductors for Subfeed Circuit Breaker

•An ambient temperature of 30°C

•Two conduits for each subfeed

•One Equipment Grounding Conductor for each conduit

If the ambient room temperature is greater than 30°C, larger conductors are to be selected in accordance with the correction factors of the NEC.

Equipment Grounding Conductors (EGC) are sized in accordance with NEC Article 250-122 and Table 250-122.

Grounding Electrode Conductors (GEC) are sized in accordance with NEC Article 250-66 and Table 250-66.

The conductor sizes are recommendations for maximum configurations. Even if the load is less than the maximum rating, it is wise to plan for future load increases. If the system is operated at a lower load than its rating and it is desired to supply the system with a lower rated breaker and smaller conductors, conductor ampacities are to be selected in accordance with the NEC. The transformer inrush must be taken into account when sizing conductors.

Table for 40°C	PDPM150G6F	PDPM150L6F	PDPM175G6H
ambient/4CCC	480:208	600:208	480:415

Mains Input Φ	Cu only: 250kcmil	Cu only: 3/0 AWG	Cu: 350kcmil
	Cu only: 250kcmil	Cu only: 3/0 AWG	Al: 500kcmil
	75°C conductor minimum	90°C conductor minimum	Al: 500kcmil
	75°C conductor minimum	90°C conductor minimum	75°C conductor minimum
			75°C conductor minimum

Equipment	Cu: 4 AWG	Cu: 6 AWG	Cu: 4 AWG
Grounding			Al: 2 AWG
Conductor (EGC)

Grounding	Cu: 2 AWG	Cu: 2 AWG	Cu: 2 AWG
Electrode			Al: 1/0 AWG
Conductor (GEC)
Output	Supplied with Power Distribution Modules

Subfeed Output	Cu only: (2) 300kcmil Φ and	Cu only: (2) 300kcmil Φ and	Cu: (2) 2/0 AWG Φ and N, 4
	N, 3 AWG EGC, GEC not	N, 3 AWG EGC, GEC not	AWG EGC, GEC not
	required.	required.	required.
	90°C conductor minimum	90°C conductor minimum	Al: (2) 4/0 AWG Φ and N, 2
			AWG EGC, GEC not
			required.
			75°C conductor minimum

150/175kw Modular PDU Installation

175kW, PDPM150G6F, PDPM175G6H, 150, PDPM150L6F specifications

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