>I use resistors across the Utility Supply quite happily and I have 240 V 
>AC. You just screw in light bulbs don't you? What are you worried about? 
>Use a fused plug?

Chris, I do NOT want to appear argumentative or afraid of using anything.  I 
do not like the idea of exposed 100v or 240v AC, in your case, loose inside 
the vault.  I can conceive a safety factor as-well-as possible ac hum.

THAT is why I am considering the DC approach.

Respectfully,
Jerry 







>I use resistors=20
across the Utility Supply quite happily and I have 240 V AC. You just =
screw in=20
light bulbs don't you? What are you worried about? Use a fused =
plug?

 
Chris, I do NOT want to =
appear=20
argumentative or afraid of using anything.  I do not like the =
idea of=20
exposed 100v or 240v AC, in your case, loose inside the vault.  I =
can=20
conceive a safety factor as-well-as possible ac hum.  
 
THAT is why I am =
considering the=20
DC approach.
 
Respectfully,
Jerry