View Single Post
Old 23rd Jul 2022, 5:27 pm   #40
pmmunro
Octode
 
Join Date: Jul 2004
Location: Dundee, UK.
Posts: 1,813
Default Re: An unusual BS546 plug

Quote:
Originally Posted by McMurdo View Post
Wandsworth did and AFAIK still do have a special hospitals divison, bedhead panels, nurse call systems, intrinsically safe light switches for operating theatres etc
Sorry to be pedantic Kevin, because I know what you mean and I'm sure you fully understand the concepts.

The switches must have been flamability protected (Exd or Exe probably) because the intrinsically safe technique (Exp) limits energy in the protected area to levels incapable of igniting a hazardous atmosphere and therefore would not be suitable for lighting.

PMM
pmmunro is offline