Heated rear window current and cable size

[GavinL]

Can someone tell me what current a saloon heated rear window draws? I intend fitting one and AES electrical sell a 20A 10 minute timer relay which sounds like a good idea -anyone fitted one of these? I also want to install the wiring in advance of getting the screen fitted by Charles Ware, so need to know what to install. Thanks.

[Chipper]

Someone called Alec on here wrote this:

"I have been watching this thread and finally got round to doing a current measurement on my wife's Traveller's heated rear screen (Obtained from the Morris Minor Centre, B'ham). It draws 6 amps, so a load of 72 watts nominal.
If a switch of sufficient capacity is fitted then there is no real need for a relay. Switches are commonly rated at 10 amps with many rated for 20 amps. 14\0.30mm (1sqmm) cable is rated at nearly 9 amps but it would be better to use 28\0.30mm (2sqmm) cable to minimise voltage drop and so give more power at the rear screen."

I'm guessing similar would apply to a saloon HRW.

[GavinL]

Thanks, I've seen posts about traveller heated screens, but wonder if saloon screens draw more current being a different shape and size?

[Chipper]

There may be a slight difference, but not as much to make it appreciable in terms of the type of switch/relay/cable you need to wire them in.