Document UT-MT-0812_ENG
Page 14 of 28
Edition 19/05/2016
Suspended edition 18/12/2014
ELEVATED LEDs A APPROACH, THRESHOLD, THRESHOLD WING BAR, RUNWAY END AND STOP BAR LERA
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
Take as reference para. 3.3 which provides the instructions to realize the
external wiring
of the two-pole
cable lead with FAA L-823 plug.
3.2
CIVIL WORKS
Each light
is usually installed on a suitable concrete block, into which a pipe elbows is cemented.
The isolating transformer is housed into a separate concrete pit which is normally placed close
the above concrete block (Figure 7).
The pit can be placed far from the concrete block too
, but in this case a suitable cable duct has to be
provided between the pit and the pipe elbow for passing the secondary cable.
As
alternative the assembly pit-pipe elbow can be replaced by a steel sheet base, which can be
used to house the isolating transformer, complete with an upper steel plate with a threaded
sleeve.
A suitable concrete block has to be provided in case of installation on frangible and lowering mast. To
house the isolatin transformer follow the suggestions given before.
Figure 7: civil works
