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Excellent summary and review. The photo, however, is of a diesel fire pump controller. The voltage drop is meant for electric fire pump controllers. Diesel fire pump controllers start the engines with DC batteries, and the 115 VAC shown there is only used to charge those batteries, so voltage drop wouldn't apply here.

The latest version of the NEC added "For flat cables, the major diameter dimension of the cable shall be used to determine the bending radius.". So you cannot use the thickness in any scenario regardless of the way it is bent.

Iam confused on wires passing through the box. If we have 4 wires passing through with out splice, we count each wire ones total 4 or all 4 wires count as total one?

What is the arc flash rating of metal sheet based on material and thickness

Outstanding as always! errata 26:32 "thousands of kilometers". As Ryan says, if you're working with a wire thousands of kilometers long, please take a video of yourself, would love to see it 😊

NEC needs to focus on electrical construction safety FULL STOP. Getting into pulled off counter potential etc is not an electrical safety issue. Where an appliance is placed or how it is used is not something electricians need to be involved with. In regards to lawsuits the requirements of the code could just as easily be used against the creators of the code as the "experts in the industry" directing the construction process. AHJ exclusions do not apply to the NFPA, so stay the hell out of it if liability is really the concern. Not to mention the dam code book is getting ridiculously large and unmanagable year over year and this kind of stuff only adds to the bloat.

Thanks!

How do you connect a live wire to a ground I need that part explained

that peninsula graphic you show is bad because the backsplash is wall space since there is no limits on heights, even the shortest of walls should be considered

I made it. I only want to pass my master exam. After that you can have the code back. I thought that they weren't going to need surge protection for diesel fire alarm control panels. /s

Watched 2 minutes aged like milk lol

They probably figure the voltage drop increase in size will help the fault protection.

You state @3:10, code for internal disconnect does not apply, even if unit has internal heater, even though such a heater is very likely directly line/grid powered. It's also the case that an inverter based appliance, if 100% electronic - is beyond the scope of the code. Function does not matter. Nothing inside either portion, of the mini split, is line/grid powered; not motor or either fan. An inverter based mini split, or maxi split, is NOT air conditioner, not code wise. If inverter based, tonnage makes no difference. The code seems to improperly use the term "air conditioner" as a generic term. The code only applies to A/C units that have line powered internal motors/components. Even the inter-unit connecting cable is not covered by code. An all electronic HVAC is a generic appliance. None of the code's "air conditioning" references apply. This is (indirectly) stated as much in your 11May2019 (UA-cam v=xDQtmZHKMUA) video, at ~11min mark; the outside motor is "line powered". Video should have pointed out that the code is wrong, the code applies generically to loads that are directly line/grid powered, and only to "air conditioner" that has line powered motor. Electrically, there is no difference between an inverter based mini split and a crypto computer with the similar internal power supplies. That any electronic HVAC used to list RLA or LRA was out of ignorance, or incompetence, by whomever made the label. Same is true for "Location" restriction. Any "common sense" narrative is irrelevant, especially since there is no user interaction, with the appliance controlled with a remote - code does not apply - at all.

You are an excellent teacher.

Run conduit or a PVC pipe along the side of the Island as a cover for the cord and outlet, nothing too dramatic, just a bumper or keeping little hands away

Thanks!

I've never seen a system like this before, thanks for explaining it in a way I can understand. My insructor back in 2010 mentioned something about to 60v legs being the safest electrical system, and I did google it at the time, but never really go to the meat of what he mentioned. today its case closed on that memory

thank you for being objective. Too many people blindly bitch about rEgUlAtIoNs!!!

Thank you for that very clear explanation

Im so confused with the part you used the cooktop + 2 ovens example. shouldnt you refer to the row with 3 equipment for that one? why do you treat it all as one equipment?

I recently joined a big company that manufactures a lot of electrical devices, this is gold for me 🫶

Ryan, I suspect a welder outlet would be a branch circuit but an RV outlet would be considered a feeder circuit.

I suspect 2-level countertops for islands and peninsulas are going to become more popular just to have a minimal backsplash area for outlets.

This is for conductive pools only and the single conductor method still seems to be accepted for nonconductive pools in the TIA correct?

This is a section of code that really irritates me at least for branch circuits. Don't get me wrong it's necessary for calculating the size pipe you need for large conductors and special cases like isolated grounds. However, after you have applied corrections for ampacity the actual practical limit is 9 current carrying conductors (#10's on a 20A circuits) anything more and the step up in wire size becomes impractical, who's going to pull #8 (THHN) for a 20A circuit? Plus you then have to upsize the conduit from 3/4 min. to 1-1/4 for up to 16 or 1-1/2 to 20 the pipe can handle 22 correction step up is at 20. I can't say you'll never do any of this, but seriously this section is mostly navel-gazing at best and leads to bad installs that could end up in dangerous situations and worst.

Great videos Ryan. You explain it well and have a sense of humor lol I subscribed

Ryan I got a question for you Ryan as per messenger wire. So from the house to a separate garage going to a sub panel. Can I turn the sub panel into a main and use too hot add bare ground for neutral ground. Or do I have to run a messenger wire with three insulated conductors and one bear

Those line side taps HAVE TO BE FUSED and cannot extend further than Ten feet. Inspectors have said this.

Line side taps are usually connected via IPC s inside of the home's main panel. Those then feed a fused disconnect next to the panel then travel outside to an unfused disconnect for the fire department per NFPA required location with signage. That then feeds the solar combiner with the strings of each array of panels.

Awesome

Look please boats have 12volt systems like rv. The biggest problem is the 12volt inverter / charger. Dont use pool equipment for 555.

Hurricane and storms flood docks. There should also be maintenance registration more. Taps go out or become questionable after storms most don't know. Also electrolysis is a issue

230.85 Emergency Disconnects. For one- and two-family dwelling units, all service conductors shall terminate in disconnecting means having a short-circuit current rating equal to or greater than the available fault current, installed in a readily accessible outdoor location. If more than one disconnect is provided, they shall be grouped. Each disconnect shall be one of the following: (1) Service disconnects marked as follows: EMERGENCY DISCONNECT, SERVICE DISCONNECT.. if I was you inspector I would be handing you a orange ucc sticker... update your labeling and use the correct terms!

In the process of wiring my house. Glad the Home Depot has a good return policy because as soon as my inspection is done I'll be returning all the unnecessary gfci breakers and returning $$ to my account!!!

What about j tubs how can you wire that

Couldn't we just use terminology of continuous duty instead of extra duty. Which continuous duty is already defined in 100

Meg the wires

On exterior of wall would you need to include the 1)2"plywood or 3/4 brown board to depth which honestly should because whatever you nail or screw on exterior should mimic drywall side.

Ranges and dryers have lcd screens which means they should just use 240 transformer so we dont need a neutral. Its 2024

Should the smart services jave manual override?

Ryan Jackson, thank you for true, and detailed information. I watch your videos to better understand the NEC.

Thank you for this, I just completed the 100 series. As a former electrical apprentice it was fun.

Hello Ryan, love your video clips, I have learnt a lot, much appreciated. I do have a request, can you please shed some light on the cold sequence metering with some examples of where, why, and when is applied. Thank you in advance.

that hotel countertop could have food served to it

If freezers/,fridgerators should Have gfi protection use dedcated gfi alarms. To. My understanding EV chargers at least most have gfi built in with capabelets to reset them selfs when nusant tripping acures,and some smart electrical engineer(s ) would come with a device that would do that for circuits with federation as will.

Thank 👌

I didn’t understand why 12:29 was a “party foul?” What’s the issue exactly?

GFCI isn't required for receptacles in an enclosed cabinet under the sink even if it's within 6 ft

Ahhh perfect..i have one under my island..it's is now considered optional...

at 5:30 you talked about flat cable width or so, and you also mentioned it is your own opinion, I googled it and saw the image of a flat cable measured the other way, instead of 0.17", it was 0.41" x5 times 2.05" radius or 4.1" diameter. www.google.com/search?q=NEC+bending+radius+reason&rlz=1C1RXQR_enUS1041US1041&oq=NEC+bending+radius+reason&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQIRigATIHCAIQIRigAdIBCTE2MDc0ajBqOagCALACAQ&sourceid=chrome&ie=UTF-8#vhid=7xqPNWtXU2FZGM&vssid=l Thanks for your great conversation! I am now subscribing to your channels because of one view of your short video shot! Thanks,