p
SECTION 100 GENERAL INSTALLATION
110
Installation
Site Requirements
120.2 Grounding Requirements
110.1 Physical Environment of Equipment
The following conditions should be met at the site
chosen for mounting the central equipment (Key Service
unit>.
The
KSU must be well-grounded. If a good conduit
ground is not present at the dedicated AC outlet, the
following steps should be taken:
1. The KSU should normally be wall-mounted to protect
against accident or flooding. Where possible
use
of a
wooden backboard is recommended for this purpose.
1. Provide a suitable waterpipe ground in accordance with
the local operating (telephone) company procedures.
2. The KSU should not be located directly beneath pipes
due to the possibility of leaks or condensation causing
damage.
2. If no waterpipe is available, a ground rod should be
installed in accordance with local operating company
procedures.
3. The area in which the KSU is located must be free of:
corrosive or inflamable gases, excessive chemical or in-
dustrial dusts, and other materials which could cause
hazard to personnel or to the proper functioning of the
equipment.
3. In the case where a ground other than conduit ground
is used a grounding terminal is provided on the ES-6 -1
as shown below in Figure 120- 1.
t’
4. Heat and humidity must be within the limits found in
Section 140 “Specifications” in this manual.
5. Although its virtually noiseless operation allows a wide
choice of installation sites, care should be taken that
the KSU not present a hazard to office traffic. For
purposed of economy a central location (to minimize
cabling) is often preferable.
/ //
#
T
PS-6-l PSU
I I
720 Electrical and Ground Requirements
120.1 AC Power Requirements
1. They system should have a dedicated 117V AC outlet
separately fused for 15 AMPS.
2. The
AC
outlet should be a standard 12SV three-prong
type which provides conduit ground.
3. The AC power must be within the limits found in Sec-
tion 140 “Secifications” in this manual.
‘1
Fig. 120-l Qutsideview of ES-G-1
4.
If the AC outlet is subject to power surges, it is re-
commended that the best locally available AC surge
protection be installed.
Page 108-l