Aha finally found the answer, they are not isolated in anyway whatsoever,=20
they rely on RCDs for ground leak detection.

This must mean then, that the whole system must be disconnected from the=20
grid if anyone is going to work on a roof or guttering, especially a tin=20
roof.

Colin
--
cdb, colin@btech-online.co.uk on 23/06/2014
=20
Web presence: www.btech-online.co.uk =20
=20
Hosted by:  www.justhost.com.au
=20
=20
This email is to be considered private if addressed to a named  individual=
=20
or Personnel Department, and public if addressed to a blog,  forum or news=
=20
article.
=20
=20
=20

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.