[RE-wrenches] double insulated wire

[Chris Mason]

So now I have to stock coloured PV Wire?


On Tue, Jul 2, 2013 at 6:49 PM, jay peltz <jay at asis.com> wrote:

> HI Ray,
>
> I agree and think that at least high voltage DC should have its own color
> code.
> Labels go away, but wire colors are forever.
>
> thanks,
>
> jay
>
> peltz power
>
>
> On Jul 2, 2013, at 11:15 AM, Ray Walters wrote:
>
> > Hi Dick;
> >
> > What you're suggesting is actually something I thought would work too:
> having totally odd colors that immediately said DC.
> > IT really would be the best, because if you go in with a meter set to
> read AC, and show no voltage, then get your voltage sniffer out, and it
> doesn't beep, you think you're double safe, when actually you could get hit
> with 500 v dc.
> >
> > I try and mark every J-box that has DC conductors in it with the DC
> voltage.  The life I save probably will be my own, as I'm getting more
> forgetful with age......
> >
> > I think one of the problems is that this is actually not a NEW issue;
>  we are reviving the 100+ year old AC vs DC battle that Edison
> Westinghouse, and Tesla, et al. fought before.  Factories have AC and DC on
> site, and it just amazes me that marking polarity isn't required by code.
>  We have to mark the bonded conductor, or the high leg in certain 3 phase
> systems, so identifying DC polarity seems just as important.
> > I actually really like your purple with a white stripe idea.  At one
> time I tried to color code for DC voltage too, (Red for 12 v, purple for
> 24, Orange for 48 v) and even used yellow tape for my PV inputs as they had
> a higher V than the battery.  Now I just try to label everything copiously,
> and have polarity align with my meter.
> > My biggest problem is still old 12 v house wiring on Romex (white and
> black)  or which side of those Monkey face outlets should be + or - ......
>  These days, I just try to switch the circuit over to AC   (go Tesla!)
> >
> > R.Ray Walters
> > CTO, Solarray, Inc
> > Nabcep Certified PV Installer,
> > Licensed Master Electrician
> > Solar Design Engineer
> > 303 505-8760
>
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-- 
Chris Mason
President, Comet Systems Ltd
www.cometenergysystems.com
Cell: 264.235.5670
Skype: netconcepts
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