2007年7月7日 · For example, the load on an 8 AWG THHN, 90°C copper wire is limited to 40 amperes where connected to a disconnect switch with terminals rated at 60°C. This same 8 AWG THHN, 90°C wire is limited to 50 amperes where connected to a fusible switch with terminals rated at 75°C. The conductor ampacities were selected from Table 310.16.

2010年4月22日 · The existing breaker is a 40 amp. I am confused by the 75 and 90 degree rating for the breakers and outlets. So if I have 8-3 romex which is 90 degree rated, I need to have a breaker and outlet rated at 90 degrees also to fuse it at 50 amps? I don't get it, the rating is just the breaker and the outlet that restricts the current in the wire?

2022年10月29日 · I came across a recent post where a couple of guys were arguing that you can't put 8awg (assuming loomex) on a 50a breaker. I disagree pretty strongly. Show me I'm wrong here: 8-104 6) and 8-104 6) a) are saying that the continuous load as determined from the calculated load cant exceed 80% of the OCP or the ampacity of the conductors. Take #8 NMD90 at 75 degrees and it's 50 amps. As long as ...

2020年10月7日 · I just got a defect for this. I installed 8 gauge copper for a tesla gen 3 charger and set it to a 40 amp breaker over its wifi for a 32 amp charge rate. Inspector says it has to be 6 guage because it can be increased to 48 amps using a cell phone. Why the **** would tesla design it this way? Ive installed more than 10 gen 3 tesla chargers using 8 gauge and a 40 amp breaker and every one of ...

2019年6月18日 · Hey everybody. I've got a spa install where the requirements are 50 amp 240 volt 4 wire with and 8 AWG grounding conductor required. How do you fellas skin a cat like this? My first thought was to run 2 2 2 4 scr to the main panel and put a 12 space main lug by the entrance to the crawl space. Then run sealtite with the necessary conductors from a 50 amp breaker in the Sub, to the outdoor GFCI ...

2009年10月11日 · Here's a chart of NM and UF cable diameters that has been used by a lot of people to determine conduit fill when pulling NM or UF in raceway: 14-2 NMB .1018 12-2 NMB .1320 10-2 NMB .1917 8-2 NMB .2942 6-2 NMB .3664 14-3 NMB .0740 12-3 NMB .0946 10-3 NMB .1399 8-3 NMB .2507 6-3 NMB .3318 14-2 UF .1405 12-2 UF .1684 10-2 UF .2107 8-2 UF .3610 6-2 UF .4657 14-3 UF .2651 12-3 UF .3078 10-3 UF ...

2009年3月16日 · Voltage drop has nothing to do with large wire to small wire v. small wire to large wire. There's no NEC requirement that the entire ciruit be a larger conductor. It matters not in VD where the smaller wire is in the circuit. In parking lot lights, I typically run #12 from the breaker to the contactor. From the contactor, I run the larger (6, 8, 2, whatever) out to the lights. I …

2024年6月13日 · Trouble with that is that the wire which is external to the cable is 2 or 3 customary wire sizes too small. [By customary I mean that, since the odd numbered sizes are seldom in stock, that the required EGC for a 200 ampere breaker is 2 sizes of the sizes normally available larger than the number 8 conductor which is there now.]

2018年1月22日 · Anyone know where I can look up and find a cheat sheet on how many NM cables you can run through various size bored holes when running romex. Mainly referring to 12/2. All replies appreciated .

2019年4月22日 · AFAIK, most of the stranded THHN and other Chapter 3 stranded conductors have 19 strands per conductor. What dictates that - is it a UL spec, or just a convention? And, does Chapter 3 stranded wire come in other configurations of strands, e.g. fewer or more?