Routing Power Cables From Under The Floor To The Bip - Nortel Passport 15000 Hardware Installation And Maintenance

836 Chapter 17 Hardware procedures
Routing power cables from under the floor to the BIP
Prerequisites
241-1501-240 5.2S2
Route power input cables in sequence from under the floor to the BIP in a
NEBS 2000 frame to establish a significant portion of the power cable path.
CAUTION
Risk of damage to power connections by weight
Use tie-wraps every 10 cm (4 in.) to fasten the cables to
the 7-mm (0.25-in.) thick strain-relief bracket (part
number P0891284 or P0911981) at the rear of the BIP. Use
tie-wraps every 15 cm (6 in.) to fasten the cables to the
cable ladder from an overhead cable trough or down the
side of the NEBS 2000 frame or equivalent. Fastening the
power cables provides strain relief from the weight of the
cables on the power input lugs at the rear of the BIP.
• You must be familiar with "Safety considerations and best practices"
(page 53).
• You need the following specialty tools:
— a deburring tool for metal
— a stable work surface for clamping and bending metal from a
knockout disk
• Four No. 1/0 AWG (53.5 mm
hole in a bottom frame plate. Since each Passport 15000 or 20000 needs
four cables (two feeds), a second switch in the same NEBS 2000 frame
means two holes are needed. Use only the number of knockouts as
required to pass cable or conduit through the bottom frame plate.
Compliance to fire regulations mandates that no openings occur in the
bottom of the frame.
2
) power cables fit through each knockout