Alternative Energy Forum including wind, solar, inverter discussions
Please Provide your feedback and interpretation of 310.15(B)(3)(c) for the Scenario below " EMT conduit with 8 conductors running 40 feet on rooftop...
I had a conversation with our leasing company. They asked us if we were installing AFCI protected inverters. I said no obviously didnt know that...
Look at a service disconnect (for a pv install that was a line side tap) that was rated for 200 amps and the fuses are 150 amp so they ran 2/0 copper...
I am sizing the circuit from the combiner box to the inverter. The Isc is 9.24A, and there are 18 strings in parallel. Aluminum conductors are being...
Hi All, I am looking for an advice and guidance in this particular project. I am connecting 3 single phase solar inverters into a 3 phase ac...
I have just had an interesting interpretation of NEC 690.8 and would appreciate comments. I designed a solar system with four arrays/strings using...
Does the neutral of a microinverter count as a current carrying conductor for ampacity adjustment per 310.15? (2008NEC). Contractor has ten...
I have three 20kW 480V 3 phase 4 wire inverters that need to interconnect with a 208V service through a step down transformer. I have been advised...
The exception to 690.14 (C)(1) states installations that comply with 690.31(E) shall be permitted to have the disconnecting means located remote from...
Hi all, I need help designing a unique Hybrid UPS system. Current System Details: Electrical- 400 amp split system (150 & 100 Ampo mains +...
Article 705.12(A) states the sum of the rating of all overcurrent protection device connected to the "power production sources" cannot be more than...
When installing a supply-side disconnect to feed a new PV system the NEC states a main bonding jumper must be placed between the grounded conductor...
Is it required, or good practice, to drive a couple ground rods at the PV array disconnect switch, especially is the PV array and disconnect is not...
Hello I am looking into a 175 kw PV system tht will get line side tied back into a 3 phase 3 wire 250 volt system. Obviously this is a unique...
I was hoping to get some assistance about blocking diodes at the string level (source circuit.) I have an RFP design requirements that the...
I plan on installing a combiner box to combine 5 strings into 1 than runs to the inverter. Is a disconnect required?
Installations with transformerless inverters such as the PVI 6000 TL are being installed and connected to arrays wired as a grounded system in our...
Ok so I have a designer/contractor who is proposing this system with the ats, generator, pv, batteries, etc. Now the one thing that I have a...
Hi guys, I have a project I have hit a snag with. I have an AE 333Nx inverter I am tying to 3 phase 4 wire wye grounded gear. The inverter...
Panel Maker #1...Here is LG Instructions http://www.lg.com/us/commercial/documents/lg-installation-guide-g3.pdf for their S1C-G3 series panels?...
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