L
OOP
D
ETECTOR
H
ANDBOOK
667/HE/20663/000
Issue 13
Page 23
Figure 4 - Typical Loop Configurations with UD Dimensions
– Diamonds
Loop tails
Maximum length of
feeder cable = 150 m
(obsolescent, use for
replacement only)
1 m
1/3 x
0.3 m to kerb edge
1 m
x
U/D