10-7
VINYL-INSULATED
WIRE
Recent engine sets become complex, and an increasing number of them are remote-controlled.
When designing or repairing such machines, special care must be taken
in
selecting their wire. Select the correct wire from
the table below by considering the following.
FACTORS
TO
BE
CONSIDERED
*
Amperage
*
Current flowing time (continuous, intermittent)
*
Wire length
*
Mechanical strength
of
wire against vibration
*
Wire size versus resistance
Size
(mm2
I
0.50
0.85
1.25
2.0
3
.O
5
.O
8.0
15.0
20.0
30
.O
No.
of
conductors/
conductor diameter (mml
7r0.32
11r0.32
1
6r0.3 2
2610.32
41 10.32
6510.32
5010.45
8410.45
4
1
10.80
70f0.80
Resistor
(Wml
2OoC
Albwable curre1
(I
0.03250
9
0.02050
120
0.00051
84
0.00087
59
0.00136
47
0.00228
37
0.00374
27
0.00550
20 0.00867
1.5 0.01410
12
*
Electrical resistance increases with wire length, and decreases as conductor diameter increases. Resistance also varies
with material even if size and length are the same.
*
Nominal size means the nominal area
of
steel wire expressed by
00
square
(SQ).
-
36
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