IOM
– STERLING III - ZONE 2 LED (ATEX, IECEx, Ex ec)
I-ST3N-01.doc
Issue 8
December 2018
4
3.2 Tools
Suitable spanners for installing cable glands.
3mm flat blade screwdriver. 12mm flat blade screwdriver. No. 6 pozidrive
Pliers, knife, wire strippers/cutters.
3.3 Electrical Supplies
The supply voltage and frequency should be specified when ordering. A maximum voltage variation of +6%/-6%
on the nominal is expected. (The safety limit for T rating is +10%). Luminaires should not be operated
continuously at more than +6%/-6% of the rated supply voltage of the control gear.
Warning: Luminaires are assessed and/or tested for EMC requirements. This is based on the disposition
of entry cables and, where appropriate, through wiring arrangements as supplied or specified.
Users must take care not to introduce wiring into parts of the apparatus materially different to that
which could be reasonably inferred from the disposition of fixed supply terminals and specified wiring.
3.4 Light Emitting Diode (LED)
LED’s are supplied in 3000, 6000 or 9000 Lumen options with the colour temperature of 4000K or 5000K
(Check nameplate for colour temperature)
3.5 Mounting
Luminaires should be installed where access for maintenance is practical and in accordance with any lighting
design information provided for the installation. The mounting attitudes are restricted to ceiling, pendant, outreach
pole (lamps facing down or horizontally outward) and horizontal wall mount. The luminaire is mounted using the
DIA 8.2mm mounting holes on the rear of the body.
On mounting the luminaire by using the holes, it is the responsibility of the user to ensure that an adequate seal is
made, to maintain the IP rating of the enclosure. Sealing Washers are provided.
3.6 Cabling and Cable Glands
3.6.1
Cables
The GRP models have facility for through wiring but do not have a facility for looping.
The temperature conditions of the supply cable entry point are such that 70ºC (ordinary PVC) cable can be used..
300/500V cable ratings are adequate and no special internal construction is necessary.
An internal earth tag can be fitted to the cable gland.
Note:
Through wiring when used, is subject to a maximum current of 16A.
3.6.2
Cable Gland Types
The installer and user must take responsibility for the selection of cables, cable glands and seals.
The product is dual certified for ATEX and IECEx and to comply with the certification for installation cable glands
and sealing plugs must be ATEX or IECEx certified (or both) depending on site requirements.
Cable glands and sealing plugs when installed must reliably maintain the IP rating of the enclosure.
The cable gland must withstand an impact value of 7Nm where the risk of mechanical damage is high or 4Nm
where the risk of mechanical damage is low.
The cable should be reliably clamped externally to the apparatus or surrounding fixture within 200mm of the cable
gland.
Where brass cable glands are used in a corrosive environment cadmium or nickel plating should be used.
20 DIA cable entry clearance holes suitable for M20 cable glands are standard.
3.6.3
Earthing
On GRP bodied luminaires, all internal metal parts are earthed through the Metal gear tray. The Metal gear tray is
earthed via supplied cable to incoming terminal block.
It is the installer’s responsibility to ensure proper earth supply to the luminaire and to ensure any metal cable
glands are properly earthed. Cable gland earth kits are available from the manufacturer.
