Preparing Your Site's Source Of Power; Grounding The Switch Hardware - Nortel Passport 15000 Preparation Manual

Table 19 (continued)
Passport 15000 and 20000 shelf air temperature rise
Altitude Shelf
configuration
1 card cage
(75 W FPs)
1 card cage
4000 m
(150 W FPs)
or 2 card
cages (75 W
FPs)
2 card cages
(150 W FPs)
(Sheet 2 of 2)

Preparing your site's source of power

Grounding the switch hardware

Room temperature degrees C
long-term short-
(normal) term
(high
speed)
£45 >45
£38 >38
£24 >24
Ensure that the electricians who install the power input cabling for the
Passport 15000 or 20000 are qualified to handle your method of power
source.
Passport 15000 or 20000 switch hardware is dc-powered directly from a
protected dc source (for example, by fuses or breakers) or indirectly from a
system of ac rectifiers. The power demand is from 50 to 100 A for each feed.
The amount of required power varies according to the number and kind of
plug-in cards. To calculate your power requirements and install the
appropriate power input cabling to where the switch will be located, see
"Power distribution and consumption" (page 125).
A Passport 15000 or 20000 switch and all other equipment installed in a rack
must be grounded to comply with NEBS requirements. The frame must be
grounded by using the silvery grounding tape, provided in the kit, mounted
against clean, unpainted metal on the rack. The adapter brackets for mounting
have the silvery grounding tape bonded to them at the factory.
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 2 Planning considerations 93
Shelf air temperature rise
degrees C
short- long-term
term (normal)
(fan fail)
£45 8
£38 15
£24 30
short- short-
term term
(high (fan fail)
speed)
5 7
10 14
20 27
5.2S2