[Milsurplus] Power line safety

[pete williams]

 Maybe the  topic  has  been hard wired  before  but the AC input
wiring  schematic to the  R-390A should be a  source of inspiration
for those seeking longevity.  For us   in OZ using 3 wire ...active,
neutral , ground  240 V, the  problems  could be  acute.
The input terminals R-390A rear,  can accept  either the active or
neutral  but only one is switched via the  FUNCTION  switch.
The rx is  switched off if the   neutral line  happens  to be wired
via  fuse to the  switch,  but still leaves the   active line live
through  the loom to the power  transformer
. Inadvertent  completing a body circuit  via the  active unswitched
line in the rx to neutral - ground  IF  so wired,  could be fatal.
Also completing  the  circuit via the switched neutral line  to
CHASSIS ground  would also be a fatal attraction !. I don't know  how
US 115 V lines perform but reckon same  principles apply.

 Whatever, switch the  active.... yep once bitten , twice  shy !
 73
Pete VK 3 IZ


Pete D . Williams
METUNG 3904
Australia
jupete at bigpond.net.au