7 Ref. no. Heating outputHeating cable length € 22358 15 W 1,5 m 1/60 720 223581 30 W 3 m 1/40 720 The following table is a quick overview of cable lengths and cross-sections: Maximum cable length in metres for the following cable cross-sections and transmittable powers: Which cable should I use? If the 24 V supply has to cover a larger distance between the transformer and the heater or the heated water bowl, please pay attention to the cable cross-section, to prevent the risk of drops in voltages along the cable’s route. Calculation to ascertain the minimum cable cross-section: Power x cable length / 3200 W/m = cable cross-section (ACable) In the example above, a distance of 25 metres between the transformer and the heater and/or water bowl and a transmittable power of 292 watts would produce the following: (292 W x 25 m: 3200 W/m) mm² = 2.3 mm² In this case, use a cable with a cross-section of at least 2.3 mm² should be used. Therefore, you should select a cable with a cross section of 2.5 mm². Cable cross-section 100 Watt power to be transmitted 200 Watt power to be transmitted 300 Watt power to be transmitted 400 Watt power to be transmitted 1,5 mm² 48 m 24 m 16 m 12 m 2,5 mm² 80 m 40 m 27 m 20 m 4,0 mm² 128 m 64 m 43 m 32 m 6,0 mm² 192 m 96 m 64 m 48 m Frost protection heating pipe 24 V • for heating the spur line of waterers • a 24 V transformer is required for operation • Voltage: 24 V • IPX7 What should you consider when using plastic water pipes? Never install heating cables directly on plastic pipes. The plastic pipe must be completely pasted with an aluminium adhesive tape (item no. 222809) beforehand for better heat transfer. It is important that only plastic pipes that are suitable for hot water installations are used. Otherwise, damage to the pipeline and water leakage can occur. Should pipelines and heating cables be insulated? The pipeline and heating cable should be insulated with a heat-resistant insulation made from mineral wool or foam of max. 13 mm thickness in order to ensure efficient operation of the installation.
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