Lucent Technologies Release 6 manual Mixed AC/DC Power and Ground

DEFINITY Enterprise Communications Server Release 6	Issue 5
Installation and Test for Multi-Carrier Cabinets 555-230-112	May 1998
1 Install and Connect Cabinets
Connect DC Power and Ground	Page 1-22

Mixed AC/DC Power and Ground

Figure 1-8 shows a power and ground layout for a mixed AC/DC-powered cabinet configuration in the same equipment room with the PPN being DC powered and the EPN being AC powered. If a second EPN is part of the system, use the same basic connections shown in Figure 1-8.

Approved

ground

Ground	75A
discharge
bar	-48V

System single-point ground

DC power supply

Coupled Bonding Conductor

1/0 AWG (50 mm2) up to 50 feet (15.2 m) or engineered for less than 0.5 voltage drop per conductor

To

AC power

source

	PPN		EPN
	cabinet		cabinet
		AC power cord
		AC power-
		distribution
-48V	-48V RTN		unit

Cabinet Ground Block

To CBC terminal block at MDF

cydfacdc RPY 021798

Figure 1-8. Typical Power and Ground for a Mixed AC/DC-Powered Cabinet