In article ,
Owain writes:
The Medway Handyman wrote:
I need to check a 3kw x 27" immersion heater element to see if it's working.
If I connect my multi meter across the terminals, what resistance should I
find?

Current will be approx 3000 / 240 = 12.9A

V / I = R therefore 240 / 12.9 = 18 ohms

Probably significantly less when cold.

--
Andrew Gabriel