WIRING
Wire the remote stations to the Master station as shown on the general tiring diagram on the following
page and as explained in the following notes:
1.
EP-825 Series Wiring
(a) Use 4WJ (2 Twisted Pair #22 AWG) for all remote station wiring.
(b) The maximum number of remote stations is 10, including the master.
(c) The maximum number of remote stations per cable is 5.
(d) MAXIMUM CABLE LENGTH CHART
Stations Per Cable
Maximum Length
1
600 ft (180m)
2
300 ft (90m)
5
150 ft (50m)
2. Run cables into the back of the Master housing and leave approximately 25cm (10 inches) of cable
for connections to the Master Station. Cable must be installed away from the power wiring, transformers,
fluorescent lights and other electrical fixtures. Cables must be protected from damage by nails, staples,
plaster, etc.
3. The transformer must be located near a source of 120 VAC: the house fuse box is a good location.
Use 3 conductor #18 wires from the transformer to the Master station. Use #16 wire if the transformer
is found more than 15 meters (50 ft) from the Master Station. Do not install the transformer closer than
1 meter (3 ft) from the Master station. Install a ground wire from the house fuse box to terminal G of
the EP-825 Master Station’s terminal board Observe local electrical codes when installing the
transformer.
4. The Master station includes a built-in antenna for AM reception. To improve AM and or FM
reception either, run two seperate wires (#22 gauge insulated) from the Master station location to the
attic or other suitable antenna location, or connect the master station to the cable TV system using the
terminals provided at the back of the master station.
5. Phone/Auxiliary Input - run two wires (#22 gauge shielded) from the music source to the Master
station. If the music source has a low impedance output, a #22 gauge twisted pair cable may be used.
IMPORTANT:
1. To improve AM reception and eliminate electrical noise, run the building ground wire to terminal
“G” on the EP-825. Make sure the wire is grounded to the building.
2. Mircom cannot guarantee the proper operation of its EP-825 intercom functions if anything but
two twisted pair wires ( Mircom # 4WJ) are used Non twisted pair wire may cause excessive squealing
and feedback.
