On Mon, 17 Mar 2008 12:07:34 GMT someone who may be "John"
wrote this:-

Remember that instant electric showers involve the water people
stand in passing over a bare uninsulated heating element. The water
is in direct contact with the electricity. That means the shower
must be installed properly, or it is likely to be dangerous to use.

Un-insulated - No - it is mineral insulated. The water is not in contact
with the electricity.

"Water heaters having immersed and uninsulated heating elements" is
the phrase used to describe such heaters in the 16th edition. No
idea about the 17th as I have yet to need to study it.

There are even water heaters where the electricity passes through
the water. These are called electrode water heaters and boilers.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54