Table of Contents
Advertisement
MAN – FD420CV VER HD
Power and Ground Wiring
This is a 28VDC monitor that requires 10.2 Amps of power to operate. The rated current of
the equipment and associated voltage drop should be taken into consideration when
selecting wire gauge. To operate properly this monitor requires an input voltage of 25-
32VDC allowing a 3 volt drop on the wire, this is equal to the sum of the voltage drop on
the 28V power wire and the voltage drop on the ground or power return wire.
The following examples are based on an install with a 28VDC power system and a total of
50 feet of wire between the circuit breaker, monitor and ground.
Example 1: 20awg wire has 9.88 Ohms per 1000 feet, this equates to .494 Ohms for 50
feet. 6.6 Amps of current on .494 Ohms will drop 3.26 Volts. This exceeds the allowable
voltage drop to operate this monitor.
Example 2: 10awg wire has 1.26 Ohms per 1000 feet, this equates to .063 Ohms for 50
feet. 6.6 Amps of current on .063 Ohms will drop 0.42 Volts. This is within the allowable
range to operate this monitor.
Resistance of Wire Type M22759/16-**
Gauge (AWG)
Some connector pins are only compatible with the smaller gauge wires. If multiple power
pins are available then all pins should be used. Multiple strands of wire may be run to the
circuit breaker panel, or the multiple small gauge wires may be joined to a larger gauge
wire for a single strand run to the circuit breaker panel. Also, use short heavy gauge wire
and a clean tight connection for ground.
It is the installer's responsibility to understand the product's requirements to install the
product in compliance with industry standards and safety.
(** = Gauge)
OHMS/1000'
20
16
12
10
8
Rev:
9.88
4.81
2.02
1.26
.701
Revision Date:
05/23/2014
M
Page 9 of 21
Advertisement
Table of Contents
