Nortel Networks Option 11C Mini ユーザーズマニュアル
Chapter 3 — System and site requirements
Page 47 of 332
Option 11C Mini
Planning and Installation Guide
Fasten the mounting bracket for each chassis to the piece of plywood with the
five, 1 in. #14 screws supplied with the bracket.
five, 1 in. #14 screws supplied with the bracket.
“Chapter 8 — Bracing the Option 11C Mini against earthquakes” on
page 105 of this guide contains a detailed procedure for earthquake bracing.
page 105 of this guide contains a detailed procedure for earthquake bracing.
Grounding requirements
Before you install an Option 11C Mini and before you apply AC power,
measure the impedance of the building ground reference. An ECOS 1023
POW-R-MATE, or another meter like the POW-R-MATE, is acceptable for
this purpose. If the ground path connected to the Option 11C Mini has an
impedance of 5 Ohms or more, make better grounding arrangements. Make
any improvements to the grounding system before you install the Option 11C
Mini.
measure the impedance of the building ground reference. An ECOS 1023
POW-R-MATE, or another meter like the POW-R-MATE, is acceptable for
this purpose. If the ground path connected to the Option 11C Mini has an
impedance of 5 Ohms or more, make better grounding arrangements. Make
any improvements to the grounding system before you install the Option 11C
Mini.
Table 9
Minimum fastener requirements
Minimum fastener requirements
Type of wall
Fasteners
Wooden studs
#10 wood screws
Embedded a minimum of 1
in. in wood studs
in. in wood studs
Metal studs
# 14 sheet metal
screws
screws
Embedded a minimum of 1
in. in metal studs
in. in metal studs
Concrete
(2000 PSI)
(2000 PSI)
1/4 in. HILTI KB-II
Embedded a minimum of
1 1/8 in.
1 1/8 in.
Masonry
1/4 in. Ramset
Redhead Dynabolt
sleeve anchor
Redhead Dynabolt
sleeve anchor
WARNING
Failure to follow grounding recommendations can result in a system
installation that is:
installation that is:
• unsafe for personnel working on, or using the equipment
• not protected correctly from lightning or power transients
• subject to service interruptions