WrenchesAs a matter of practice, we always use conduite, never direct burial,
always copper too, we have had AC and DC in the same trench but with space
seperating the conduits and have had no issues with noise or JHA. As a safety
issue we would not risk direct burial of high voltage DC regardless. Jerry
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: Ray Walters <[email protected]>
Date: 12/28/16 12:00 PM (GMT-10:00)
To: RE-wrenches <[email protected]>
Subject: Re: [RE-wrenches] AC/DC in Same Trench?
Also, you didn't specify, but AC and DC are specifically allowed in
the same raceway per 300.3(C)(1). Only If the DC circuits are PV
source or output circuits, then 690.31(B) prevails, which says they
can't share a raceway. But again, as Chris mentions, this
restriction does not apply to direct burial.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 12/28/2016 12:58 PM, Chris Mason
wrote:
No problem with same trench, the requirements are
that they are not in the same raceway.
On Wed, Dec 28, 2016 at 1:37 PM, Corey
Shalanski <[email protected]>
wrote:
For some upcoming utility-scale projects our
design team is wondering about placing direct-bury AC and
DC circuits in the same trench.
- Firstly, is this even Code-permissible?
- Secondly, are there any common sense reasons
(induced voltage/signal interference/etc) for not doing
this?
Thanks,
Corey Shalanski
Joule Energy
New Orleans, LA
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--
Chris Mason
NABCEP Certified Solar PV
Installer™
Solar Design Engineer
Generac Generators Industrial
technician
www.cometsolar.com
264.235.5670
869.662.5670
Skype: netconcepts
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