I-800I-01.doc Issue 06 November 2013 3
IOM – 844I, 854I & 864I - SS FLOODLIGHTS (IND)
3.5 Lamps
The high pressure sodium lamps are of a standardised type. There is no preference between make or colour.
The 844I model has an E27 lampholder, the 854I and 864I models have an E40 lampholder.
MBI lamps are not standardised in the 250W and 400W range. For MBI the 3.0A 250W lamp and the 4.2A
400W lamp is used.
Only tubular lamps should be used. Both specular (plain) and dispersive (mottled) reflectors are available for all
luminaires and should be specified when ordering.
Anti-glare shields are available for all types but must be ordered with the equipment, as the fixings are not
standard. Care must be taken to fit the correct lamp in order to obtain the designed photometric performance.
HPS and MBI lamps should be replaced shortly after they do not light. The indication of the end of life for HPS
lamps is “cycling”, where the lamps goes out then re-ignites after a minute or so interval. If discharge luminaires
are burned continuously, they should be switched off occasionally to allow old lamps to fail to re-ignite, rather
than possibly becoming diodes with possible detrimental effects to control gear. The above information is
current at time of printing. The development of lamps and control gear is ongoing and detailed advice on lamp
performance can be obtained from the lamp supplier or from Chamlit. HPS and MBI circuits should not be
energised without a lamp fitted. HPS and MBI lamps with internal ignitors must not be used.
3.6 Cabling and Cable Glands
The temperature conditions of the supply cable entry point are such that 70ºC (ordinary PVC) cable can be used
in all the standard range luminaires. The maximum looping size is 2.5mm² with 6mm² single entry as standard.
Two entry points capable of accepting 20mm glands are standard. It is the responsibility of the user to ensure
that the correct cable size and fuse rating are used.
Cable glands where installed should maintain the IP rating of the luminaire and if using metal glands, should be
of suitable material or suitably protected to meet any prevailing environmental conditions. Plastic glands may be
used except in cases where the earth is provided by means of the cable armour in which case a suitable metal
gland should be employed. Care should be taken to ensure that a good contact is made between the gland and
the body of the luminaire.
It is the responsibility of the user to ensure that an adequate seal is made between the gland and the body to
maintain the IP rating.
3.7 Cabling and Fitting Lamps
Access for cabling and fitting lamps is by removing the front cover. Before removing the cover on any occasion,
check that the cover support chain is sound.
The cover is released by undoing the two toggle clips using a screwdriver or a peg through the hole in the clip.
Reselect the voltage tappings if necessary.
Install the conductors in the appropriate terminals. Take care not to cut back the insulation excessively, 1mm
bare conductor outside the terminal is a maximum.
Any unused terminal should be fully tightened.
When the cabling is complete, make a final tightness and connection check.
Lamps must be of the correct type and firmly screwed into place. The cover is replaced and the toggle clips
snapped over.
3.8 Inspection and Maintenance
Routine inspection should be carried out at a minimum of 12 monthly intervals and more frequently if conditions
are severe. The time between lamp changes could be very infrequent and this is too long a period without
inspection.
3.8.1 Routine Examination
The equipment must be de-energised before maintenance. Individual organisations will have their own
procedures. What follows are guidelines based on Chalmit’s experience :
1 Ensure the lamp is lit when energised and that the lampglass is not damaged.
2 When de-energised and left to cool there should be no significant sign of internal moisture.
If there are signs of water ingress, the luminaire should be opened up, dried out, and any likely
ingress points eliminated by re-gasketting.
3 Check all cable glands for tightness and nip up if necessary.
4 Check all cover toggle clips for tightness. If they appear slack, re-set by bending the angle
between the long sides of the clips until they require firm pressure to lock into place.
5 Clean the lampglass.
