Gentlemen, This thread and related threads is getting well past our max OT
posting limit. Please take it off list for now and report back on your final
conclusions if you come to agreement.
73,
Eric
Moderator most of the time..
elecraft.com
_..._
> On Apr 18, 2018, at 4:09 PM, Phil Kane
On 4/18/2018 11:28 AM, Jim Brown wrote:
> NEC does not apply to low voltage DC systems.
Oh? Check NEC Section 7 , specifically Article 720, which applies
specifically to Low Voltage systems. (We do a LOT of 48V distribution
system designs.)
Philip M. Kane Esq / P.E. (K2ASP since 1952)
VP -
On 4/18/2018 1:33 PM, Josh Fiden wrote:
SS30 is an SMPS so a different beast than the prior discussed linear
supplies. It's possible that the DC return to chassis connection is
needed for EMC compliance. That's providing a low impedance return
path for noise generated by switch elements.
There's no safety requirement that DC return be connected to chassis.
SS30 is an SMPS so a different beast than the prior discussed linear
supplies. It's possible that the DC return to chassis connection is
needed for EMC compliance. That's providing a low impedance return path
for noise
Jim, I am not sure why you suggested I check for paint under the mounting
screws. IT IS bonded to the chassis and cannot be isolated.
I did not believe that the NEC applied but I was not sure about UL.
Michael Blake
k9...@mac.com
> On Apr 18, 2018, at 14:28, Jim Brown
On 4/18/2018 11:10 AM, Michael Blake wrote:
It seems that my newest Astron SS30 power supply does not allow for the
negative post to be isolated from the chassis. The green wire can be
disconnected from the chassis but the negative rail of the DC output can not be
isolated from the chassis.
I though I would separate this from the other discussion. It seems that my
newest Astron SS30 power supply does not allow for the negative post to be
isolated from the chassis. The green wire can be disconnected from the chassis
but the negative rail of the DC output can not be isolated from
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