OSRAM HALOTRONIC-PROFESSIONAL HTL - Manual (Page 19)

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5.3 Cable routing To ensure good radio interference suppression and maximum safety
and reliability, the following rules for cable routing should be obser-
ved:
. Cables between the transformer and the lamp (HF cables) should
be kept as short as possible (to reduce electromagnetic inter-
ference).
2. Mains and lamp cables should never be routed in parallel. Keep HF
cables and mains cables as far away from one another as possible
(e.g. 5 to 0 cm). This avoids mutual interference between mains
and lamp cables.
3. Lay HF cables away from any metal surfaces (if possible several cm
away) to reduce capacitative interference.
4. If two long single HF cables are unavoidable they must be twisted
together.
5. Keep mains cables in the luminaire as short as possible to reduce
interference.
6. Do not lay mains cables too close to the transformer (this applies in
particular to through-wiring).
7. Avoid crossing mains cables and lamp cables; if this is not possib-
le, they should cross at right angles (to reduce HF interference on
the mains cable).
Cable penetrations through metal components should never be left
unprotected and should be fitted with additional insulation (sleeve,
grommet, edge protector, etc.).
Electronic transformers can be installed in a wide variety of places,
including suspended ceilings, furniture, luminaires and tube systems.
The transformers may be mounted on wood since the units comply
with the requirements for
labelling according to VDE 070 and
VDE 000 Part 559.
If HALOTRONIC ® is to be dimmed it should be installed away from
resonating surfaces so that any dimming noise is not magnified by
vibrations.