Emerson NT5C06D Installing the AC power, AC cable wire size, AWG for each rectifier, Max

Installation and start-up 21

Installing the AC power

Permanent AC connection to the MPS75 power shelf is done using two armored cable conductors, RW-90 or equivalent, as listed in Table 2. One must be routed to L1, and the other one to L2 and to the safety shelf frame ground (FR GND). The cabling must comply to the local electrical code. The power shelf is equipped with a strain relief to terminate the conduit. The cable length should be minimized and be properly secured.

Table 2 - AC cable wire size

		2 RECTIFIER POSITIONS		3 RECTIFIER POSITIONS
Individual AC	12	AWG for each rectifier	12	AWG for each rectifier.
Common AC	8 AWG		6 AWG
Table 3 - AC Fuses
		2 RECTIFIER POSITIONS		3 RECTIFIER POSITIONS
Individual AC	20	A max for each rectifier	20	A max for each rectifier
Common AC	40	A max.	60	A max.

Figure 4 - Power shelf common AC connection

L2

FR GRD

L1

Helios Rectifier 25/48 Installation and User Manual