Re: [RE-wrenches] Neutral sizing

Hi Jay, Is this for an inverted output circuit? If so then I think the NEC reference you’re looking for is 705.95(B). That says you can size the neutral to the same size as the EGC if the neutral is used only for instrumentation, voltage detection or phase detection. A number of single phase

Re: [RE-wrenches] Neutral sizing

Here is the code reference explaining this conductor size disparity from 2017 NEC: "According to Table 310.15(B)(16), a 3/0 AWG, Type THW copper conductor has an ampacity of 200 amperes. However, for a 3-wire, single-phase dwelling unit service, as shown in Exhibit 215.2, 310.15(B)(7) permits a s

[RE-wrenches] Ham Radio interference

Hi Wrenches, I've got a proposal out there for about a 11.5 kW grid-tied system. We are planning on using Enphase IQ 7+ inverters. Quick question, this guy has a pretty large Ham Radio setup operating at 3-30 MHz. He has a directional antennae that can push 1500W sometimes. Has anyone had any

Re: [RE-wrenches] Neutral sizing

What about 4/04/02/0 aluminum, service feed? Or is that utility excepted? Dana Orzel Great Solar Works, Inc. C - 208.721.7003 d...@solarwork.com Idaho Contractor - # 028

Re: [RE-wrenches] Neutral sizing

At the risk of sounding like a grandpa Wrench...I've never had or seen a neutral conductor be smaller than current carrying. marco -Original Message- From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jay Sent: Friday, September 21, 2018 3:47 PM To: re-wre

Re: [RE-wrenches] Code signage for battery back-up?

There definitely areNEC signage requirements. VT is in NEC 2017.  I'll put the references below each bullet. On 9/21/2018 2:55 PM, David Palumbo wrote: What is the current code requirements around the country for required signage for a residence/business with back-up battery storage?