1. We will be in Read Only mode (no new threads, replies, registration) for several hours as we migrate the forums to upgraded software.

UL508 - Secondary grounding

Discussion in 'General Electronics Chat' started by Skeebopstop, Jul 31, 2009.

  1. Skeebopstop

    Thread Starter Active Member

    Jan 9, 2009
    Hi all,

    I've read in UL508 that a 1000volt-amp transformer need only ground its secondary center tap with 14 AWG wire. In reality I'm only at about 300volt-amp, but they have no lower limit.

    What I have right now, is my secondary ground tied to my RF-ground, which goes through a spacer to the chassis via a 0 Ohm SMD jumper (1206 size for now, ironically enough 2512 size is still rated to the same current). I don't want to run a 14AWG wire because this is all SMD style stuff and that complicates the assembly process greatly.

    What if I replaced the SMD jumper with simply a net tie of pure copper?

    I can't find much listed on this as a practice. Perhaps someone with a bit more experience can remark?