American Power Conversion InfraStruXureTM System manual Electrical Requirements and Specifications

Electrical Requirements and Specifications

Procedures requiring a licensed electrician

Electrical Hazard

See also

Procedures requiring a licensed electrician include:

•Connection of utility conductors

•Installation of a 350-, 150-, or 125-amp circuit breaker

•Connection to the Main Input switch

•Connection to a branch circuit

•Connection to the cross tie output breaker

To connect utility conductors, see Certified Electrician’s Instructions (990-1469A) included with your InfraStruXure PDU documentation.

Electrical requirements

	208VAC	480VAC	600VAC
Upstream circuit breaker † ‡	350A	150A	125A
Conductors to Main Input switch† ‡*	3W + G, 4W + G*	3W + G + GEC to building steel
Conductors to the Bypass Input switch† ‡	4W + G
Conductors to the Cross Tie Output	4W + G
breaker† ‡
Recommended wire sizing‡
L1, L2, L3	400kcmil (350A)	1/0AWG (150A)	2AWG (125A)
N*	400kcmil	1/0AWG	2AWG
G	3AWG	6AWG	6AWG
GEC	1/0AWG	6AWG	8AWG
Torque according to wire size
L1, L2, L3	Underfloor Wiring: 500in-lbs, Overhead Wiring: 160in-lb
	(18Nm) of lugs onto the circuit breaker
N	125in-lb
G, GEC	45in-lb if single terminal (ground), 50in-lb if double terminal
	(G + GEC)

*Transformerless PDUs only.

† Provided by customer.

‡ Consult local and national codes for sizing requirements.

InfraStruXure System—Installation and Start-Up 11