MAN0443.P65 Issue 13 Aug 04
5701 Control System
05701-M-5001 A02279
CHAPTER 4 - INSTALLATION INSTRUCTIONS
4 - 21
11.3
Cable Resistance Guide
A guide to the resistance of various copper cable sizes is given below:
Solid Copper Conductor
Cross Sectional Area (mm˝) Maximum resistance at 20
°
C (ohm/km)
0.50
38.0
0.75
25.3
1.00
19.0
1.50
12.6
2.50
7.6
Stranded Copper Conductor
Cross Sectional Area (mm˝) Maximum resistance at 20
°
C (ohm/km)
0.50
36.8
0.75
24.5
1.00
18.4
1.50
12.3
2.50
7.4
11.4
Catalytic Sensors
The maximum line resistance of cabling for a catalytic sensor varies
with the current and voltage requirements of the type of sensor installed.
It is also subject to a maximum of 10V permitted across terminals S
and NS at the Field Interface/Relay Card.
Maximum line loop resistance is calculated as follows:
10 - V
s
R
L
=
I
s
Where:
R
L
=
Total Line Resistance (ohms)
V
s
=
Sensor Voltage (V)
I
s
=
Sensor Current (A)
