Using An Optional Power-And-Ground Assembly - Nortel Passport 15000 Hardware Description

76 Chapter 2 Breaker interface panel

Using an optional power-and-ground assembly

241-1501-200 5.2S2
• one lug per pair of studs that is a 90-degree offset narrow-tongued 2-hole
lug sized No. 2/0 AWG; the lug is oversized so that it accommodates the
different thicknesses of 1/0 AWG (53.49 mm
manufacturers, for example, with a 0.625 pitch
Note: When using power input cables that are thinner than 1/0 AWG, you
must provide lugs matched to the cable gauge. When powering from an
Astec MFA150 power system of ac rectifiers, the appropriately sized lugs
for power cable installation are specified for the installation.
• one insulating boot per pair of studs to safely cover the studs, the end of
the 1/0 AWG cable, and the lug
Note: When using power input cables that are thinner than 1/0 AWG, the
same insulating boot is used and the gap is addressed by the procedure to
connect each cable.
The power-and-ground assemblies enable the connection of power input
cables ranging in size from No 6 AWG (13.3 mm
and enables using cable that is much less flexible than Super Flex. There is a
polyvalent version (part number A0834143) and an equivalent version (part
number A0834149) for the European Telecommunications Standards
Institutes (ETSI). Both versions are identical in purpose and function. The
mounting bracket of either assembly fits a NEBS 2000 frame, that is, a
21-inch wide mounting apparatus.
Each power-and-ground assembly includes:
• four pairs of terminal blocks along a rail, one per breaker interface panel
(BIM); the uneven spacing is normal
• a bridge between the frame ground terminal and the adjacent battery
return terminal (only on the ETSI terminal blocks)
• from each bridge, one ground cable ended with a straight 2-hole lug
(ETSI only)
• at the top of the left and right terminal blocks, a clamping screw into the
openings for the cables
• a blank label to identify the cable connection for each terminal block
2
) cable by various
2
) to 2/0 AWG (67.43 mm
2
),