16 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. 1.5 mm² 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 Accessories Frost protection heating pipe 24 V • for heating the spur line of waterers • a 24 V transformer is required for operation • IPX7 Ref. no. Heating output Length € 22358 15 W 1,5 m 1/50 720 223581 30 W 3 m 1/40 720
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