DoorKing 1812 Owner's Manual download pdf (Page 15)

TELEPHONE LINE WIRING

WIRE SIZE MAX DISTANCE IN FEET

24 AWG 800

22 AWG 1600

20 AWG 2200

18 AWG 3600

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.

POWER WIRING

WIRE SIZE MAX DISTANCE IN FEET

18 AWG 100

16 AWG 200

The 1812 Plus system 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.

1812-161-E-1-10 Page 15

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DoorKing 1812 Owner's Manual Page 15