Document UT-MT-0778_EN
Page 26 of 39
Edition 11/03/2014
Supersedes edition 02/03/2014
LED INSET THRESHOLD/END LIGHT L
THE04
INSTRUCTION MANUAL FOR USE, INSTALLATION AND MAINTENANCE
1. L-868 base
2. O-Ring between
fixture and base
Figure 15 – Gaskets for L-868 base
3.4
SECONDARY WIRING
The IEC 61823 International Standard (AGL series transformers) states at para. 4.6
that “if an earthing connection is provided, it shall be connected to the larger socket
of the transformer secondary connector.”
This means that, when a fixture is directly connected to the relevant isolation
transformer (provided with earthing connection), the fixture secondary side is wired
to the grounding network through the larger pin of fixture plug.
In case of an inset fixture, installed in the taxiway/runway pavement on its shallow
base far from the relevant isolation transformer, it is necessary to provide a
secondary extension between fixture and transformer. To help the installer to
identify the larger socket of the female connector inside the base (when installed),
the base secondary cable leads are identified by a colour code: the grey wire is wired
to the larger socket, the black wire to the other one. In this way it will be easy to
assure the earthing wiring, above described, between the larger socket of the
transformer secondary connector and the larger pin of the fixture plug.
