Keri Systems EntraGuard Bronze Quick Start - Manual (Page 4)

EntraGuard Bronze
1530 Old Oakland Road, Suite 100 01911-001 Rev. J
San Jose, CA 95112 USA
(800) 260-5265 (408) 451-2520 FAX (408) 441-0309
Web: http://www.kerisys.com E-mail: [email protected]
Page 4 of 32
Quick S
tart Guide
Telephone Entry
2.2.1 Earth Ground
For safety and for EMI noise reduction reasons, the EntraGuard Bronze’s enclosure must be earth
grounded. Using a ground wire, connect the unit’s enclosure to a known earth ground (such as a
ground rod or a conductive cold water pipe), observing all applicable codes.
2.2.2 Power
The EntraGuard Bronze uses a 20 VA plug-in transformer which must be plugged into an
unswitched (always ON), standard 120 VAC wall outlet. For best operating conditions:
• The outlet should be free from any other loads (preventing power fluctuations from affecting the
unit).
• Locate the outlet/transformer as close as possible to the unit.
• Ensure the transformer will not be accidentally unplugged from the outlet.
If the transformer cable length is not sufficient to reach from outlet to unit, additional cable can be
added. To ensure proper voltage and current at the unit, Table 1 lists the wire gauge to use based on
run distance.
Table 1: Recommended Wire Gauge per Run
Distance
Wire Length in Feet Minimum Wire Gauge
0 to 200 18
201 to 500 16
501 to 1000 14
1001 to 2000 12