2.6. Lamp holder / cap
Lamp holders and wiring for T5 lamps should be the 500V
rated versions.
T5 VHO Extreme Temperature lamps have flattened pins for use in
combination with Gx5 lamp holders. T5 lamps with round pins will
not fit into the Gx5 lamp holders.The Gx5 lamp holders have a
small plastic part on the top which prevents the insertion of lamps
with round pins.
The following distances between lampholders in the luminaire
must be used:
T5 VHO 95W Extreme Temperature (46 in)
Minimum distance
45.24 in
Maximum distance
45.29 in
The Gx5 lamp holder can be mounted in the same way as G5 lamp
holders. In case you are using automatic checking equipment of the
wiring with automatic probes inserted in the top of the lamp holder,
this operation is unfortunately no longer possible as the holes are
used for the plastic insert of the Gx5 lamp holders.
The existing lamp holders for G5 capped lamps are suitable up to 250
volts, which means that the applied voltage must be lower than 250
volts towards the ground. As T5 lamps are especially designed for
operation with the high frequency ballasts the voltage may exceed
250 volts under dimming conditions.
Several lamp holder manufacturers have G5 lamp holders in their
range that are marked 500V, which means that voltages up to 500
volts towards the ground are allowed.
In general, all requirements relating to G5 type lamp holders will be
summarized in IEC 60061-2, 60061-4 and 400.
OEM Design Guide
Philips T5 VHO and HO Extreme Temperature Lamps and Ballasts
7
