Power Wiring; Surge Suppression And Grounding - DKS 1812 Owner's Manual

1.5

Power Wiring

Do not run telephone lines and high voltage lines in the same conduit. Separate high voltage and
telephone line conduits by at least six (6) inches.
The 1812 Access Plus operates on 16.5 VAC. Do not power this device with 24 volt AC power.
Use the supplied power transformer, 16 VAC, 20 VA (or U.L. listed equivalent) to power the telephone
entry system. Do not power any other devices (electric strikes, magnetic locks, etc.) from this power
transformer. For wire runs up to 100 feet, use 18 AWG wire. For wire runs up to 200 feet, use 16
AWG wire.
1.6

Surge Suppression and Grounding

Proper grounding and the use of surge suppressers can significantly reduce the chance of
component failure because of static charges or surges. To be effective, ground connections should
be made with a minimum 12 AWG wire to a ground point within 10 feet of the device being protected.
The ground point must be at an electrical panel, a metallic cold water pipe that runs in the earth, or a
grounding rod driven at least 10 feet into the soil. A gooseneck mounting post anchored in
concrete does not make a good ground.
It is highly recommended that telephone line surge suppresser (DoorKing p/n 1877-010) be installed
to help protect the system from phone line power surges.
It is highly recommended that a low voltage surge suppresser (DoorKing p/n 1878-010) be installed to
help protect the telephone entry system from power surges.
1812-162-B-6-09
TELEPHONE LINE WIRING
WIRE SIZE
24 AWG
22 AWG
20 AWG
18 AWG
POWER WIRING
WIRE SIZE
18 AWG
16 AWG
MAX DISTANCE IN FEET
800
1600
2200
3600
MAX DISTANCE IN FEET
100
200
Page 15