On 15/05/2018 11:58, Martin Brown wrote:
On 15/05/2018 11:17, Dave Plowman (News) wrote:

snipped

Despite being rated at 13 amps, most sockets and plugs aren't happy to
carry that for very long periods. They are a domestic connector and
really
for intermittent use at full capacity. As with a kettle or washing
machine
etc. Hence things like 13 amp water heaters normally not plugged in, but
hard wired. Same sort of thing with storage rads.

Indeed. 3kW is pushing it on a standard plug and socket for a near
continuous load. They are fine for intermittent loads like kettles.

ISTR there is a revision that recommends no portable appliances with
load 2.4kW due to the fragile nature of nominally 13A plug and sockets.

I can't see anything official (and I didn't try that hard) but a
supporting data point is fan heaters. Usually 2kW max, sometimes a
little more, but I've not seen 3kW.

Cheers
--
Clive