Why not run a higher voltage around (12V?) and regulate (switcher?) at each
location. This will result in less IR loss because the current will be less=
,
and the regulators will hide a lot of garbage on the supply from the load.

~ Bob Ammerman
RAm Systems

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of Allen Mulvey
> Sent: Friday, October 13, 2017 9:47 AM
> To: 'Microcontroller discussion list - Public.' <piclist@mit.edu>
> Subject: RE: [EE]: Long DC power runs for an escape room game
>=20
> Is there a reason to measure the voltage drop at a current level much
higher
> than the fused rating?
>=20
> It should be possible to use an old fashioned rheostat to set the current
at or
> slightly above the fused value then just measure the voltage drop
directly.
> This would be non-destructive to both the wire insulation and the power
> supply.
>=20
> Allen
>=20
> > Volt drop over length. To test this I was going to double
> the
> > length, then
> > using my trusty Bench PSU limit current to Max expected then place a
> > short at far end and measure the volt drop.  Sound feasible.?
>=20
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--=20
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