Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Installation 5 - 7
DC Output Power
The J85503C-3 rectifier requires two dc output cables connected to each
of the positive and negative output terminals. Figure 5-3 shows the
output terminals. Figure 5-4 shows the opening in the top of the rectifier
for the dc output cables. Table 5-B specifies possible dc output cable
sizes and their connectors.
The 4/0 cables allow for a maximum loop length of 100 feet while
limiting the voltage drop to 2 volts between the rectifier output terminals
and the batteries. The rectifier's regulation circuit, if connected,
compensates for this drop. For a longer loop length, to reduce heat in
cable racks, or to reduce the voltage drop from the rectifier to the
battery, larger wire may be used. The rectifier will accept two
350KCMIL cables at each of the positive and negative output terminals.
The output cables must have a minimum rating of 90° C.
The term “rectifier charge cables” refers to the DC power cables which
connect the DC power output of a rectifier to the power plant batteries.
They are also called “rectifier output cables” or “battery charge cables.”
The rectifier charge cables are unfused and must be segregated from all
other racks for their entire lengths. These cable racks must be dedicated
to these conductors.
Rectifier control cables, framework ground cables, and AC input BX
(where permitted) may be run on cable brackets off the cable rack
stringers, but not on the rack itself.
NEC Article 318 restricts 1/0 to 4/0 cables to a single layer on a cable
rack. However, NEC Article 318 allows two layers of cables
250KCMIL and larger up to a particular cable fill area. For these
applications, 350KCMIL cable is usually more energy efficient.
Table 5-B: DC Output Options
Amps
Output Wire
Gauge and Area
(Circ Mils)
Connectors or Lugs
Nut
Provided
400
4/0 AWG
211,600 circ mils
WP91412 L-59 (Class B)
WP91412 L-27 (Flex)
3/8-16
350KCMIL
WP91412 L-61 (Class B)
WP91412 L-86 (Flex)