Doncaster H6242Y is a 2.5 mm² twin and earth cable with a grey PVC sheath, made to BS 6004 and BASEC approved. It is a common fixed wiring cable for the mains supply to an air conditioning unit, such as a spur or final circuit to the isolator and indoor or outdoor unit, and for general domestic and light industrial wiring. Supplied on a 100 m reel.
It has plain annealed copper conductors, PVC insulation and sheath and a bare circuit protective conductor (earth), with brown and blue cores, rated 300/500 V. It can be installed in conduit, trunking or clipped direct in dry or damp premises, and is intended for fixed installation only.
2 core + earth
Twin and earth
BS 6004
Manufacturing standard
⚠ Electrical work: competent person only
Fixed wiring must be designed and installed to BS 7671 by a competent person. In dwellings in England, new circuits are notifiable under Part P of the Building Regulations. Size the cable and its protective device for the unit's rated current, the cable length and the installation method.
⚠ Fixed wiring only, protect from sunlight and ground
Twin and earth is intended for fixed installation in dry or damp premises. It must not be laid underground, and the grey PVC sheath is not designed for direct sunlight. Run it in conduit or trunking, or choose a suitable outdoor-rated cable, for exposed external runs.
ℹ Earth sleeving and unit manual
The bare earth conductor must be sleeved green/yellow at terminations. Check the air conditioning unit's installation manual for the supply cable size, the protective device rating and any isolator requirements.
Key features
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BASEC approved
BASEC approved and manufactured to BS 6004:2012 for fixed wiring.
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Plain annealed copper
Plain annealed copper conductors with brown and blue cores and a bare earth conductor.
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PVC insulated and sheathed
PVC insulation and a grey PVC sheath for durable fixed installation.
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Domestic and light industrial
Suited to domestic and light industrial wiring, including supply circuits to air conditioning units.
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100 m reel
A 100 m reel covers several installations from a single purchase.
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Flexible installation
Install in conduit, trunking or clipped direct. Minimum bending radius of 6 x ∅.
Technical specification
Product
Type
H6242Y twin and earth PVC insulated, PVC sheathed cable with circuit protective conductor
Manufacturer part number
H6242Y2.5G100
Conductor size
2.5 mm², 2 cores plus earth
Construction
Standard
BS 6004:2012 Table 4
Conductor
Plain annealed copper
Insulation
PVC, brown and blue cores
Circuit protective conductor
Bare copper (requires green/yellow sleeving)
Electrical and thermal
Maximum conductor temperature
70 °C
Minimum bending radius
6 x overall diameter
Current carrying capacity
Refer to Appendix 4 of BS 7671 for your installation method
Frequently asked questions
Is this the right cable for the power supply to an air conditioning unit?
Twin and earth is the usual fixed wiring cable for mains supply circuits. Check the air conditioning unit's manual for the supply cable size, the protective device and the isolator requirements, and have the circuit designed to BS 7671.
Can I use it outside or underground?
It is intended for fixed installation in dry or damp premises and must not be laid underground. The grey PVC sheath is not designed for direct sunlight, so use conduit or trunking, or an outdoor-rated cable, for exposed external runs.
Does the earth need sleeving?
Yes. The bare circuit protective conductor must be sleeved green/yellow at every termination.
What size cable do I need?
It depends on the unit's current, the protective device, the cable length and the installation method. Follow the manufacturer's guidance and BS 7671 current-carrying capacity and voltage-drop requirements.
Is it the same as Earthsure?
No. Earthsure is Doncaster's twin and earth with a pre-identified green/yellow earth. The H6242Y has a bare earth conductor that needs sleeving.