Practical Electrical Wiring-MC to Emt Connectors

[brkfstclub35]

You know what Pal, I like this measure as a field expedient to getting a job done! However, I would still prefer a 4x box on top of a wall for future.

[sparkyUonline]

@brkfstclub35 Agreed!

[GypsyMoFoJoe]

If you look at any of Mike Holt's NEC diagrams, he constantly illustrates a conduit to flexible raceway transition using a RMC coupling and he's "Mr NEC Guru"...I always meant to email him about it.

[PaydayLoanHelp]

This is a great example. I will hardly ever need to use this but it is good to know.

[gavinfranssen]

In Canada "MC" is called "BX" thats different eh?

[brkfstclub35]

@gavinfranssen I heard BX cable was short for Bronx cable because the stuff was manufactured in the Bronx of new yorke

[sparkyUonline]

@brkfstclub35 New one to me,where'd you hear that from?

[dragmit]

Lets see, 3/4 inch copper pipe for a fuse ... think a plumber was here?? <;-P

[GypsyMoFoJoe]

I have previously seen/see and did/do the raceway transitions using a rigid threaded coupling. I will also insert threaded reducers into the coupling to convert pipe to one trade size down flexible raceway ( i.e 3/4 EMT to 1/2 LFMC or to 1/2 Greenfield)....Did I know its a NEC violation,yes...Will I continue to do it, YES! I keep handy Bridgeport 291-MS or equal EMT to Rigid couplings (check those out). They look more professional and I will continue to violate the NEC with their use.

[dralph1965]

the use of a threaded hard-wall couplings is not UL listed for connecting anything other then threaded counduit.......a lot of electricians make this mistake in the field ....i was surprised to see this from someone teaching on-line......i would be more careful before you suggest practical electrical solutions to the general public.

[sparkyUonline]

@dralph1965 I found the UL listing requirements for such fittings. You are correct in the fact that it is done all the time,doesn't make it right. Any person doing electrical work should be informed of the NEC and UL requirements. I am glad you pointed this out,it is a good learning experience for all, which is why I like feedback on my videos.

[GypsyMoFoJoe]

@sparkyUonline I guess you dont have a EC&M or ElectricalContractors magazine subscribtion. One of these two "free" publications had an article awhile back about the coupling violation

[sparkyUonline]

@GypsyMoFoJoe Ahh but I do subscribe however I missed the article-remember which issue?

[sparkyUonline]

@dralph1965 Added annotation for the part to use meeting UL requirements @2:17

[gswimfrk]

Awesome Video!!! I was wondering.... the emc to mc connector, I have seen some people use that for emc to romex. Is that legal?

[sparkyUonline]

@gswimfrk Technically your not allowed to run romex in conduit but in certain conditions limited use is allowed.

[gswimfrk]

@sparkyUonline Thanks! Another question I have is how many mc cables (12/2 w/ground) can I put in a 1 inch diameter hole in a joist?

[sparkyUonline]

@gswimfrk A far as code is concerned I couldn't find an exact article but some say the derating rule comes into play. Here is the code section that references such applications 552.48 that you may want to look at.

[MrCinimod93]

my uncle has striped mc with a hack saw for 30 years and i do believe that anti short busings are code hear in nova Scotia 

[sparkyUonline]

@MrCinimod93 I have used many different tools to do this but I require all helpers and apprentices use a MC splitter.

[RealDealSER]

Hey sparky! I seen some of your videos labeled " What were they thinking/Why would someone do this" etc.. and i emailed you some pictures of a basement that I came across in my home buying experience. Great Job on the videos, keep up the Great work :)

[sparkyUonline]

@RealDealSER Thanks for your comment! Yep took a look at those pictures alright, its a common problem around the world.

[fritzhvac]

Hey Sparky !

Brother I have been using the Snap into Method, then take my Bulldogs and Cut for Years now !!!

Today I went to Home Depot and Bought me a Klien AutoClamping 53725 !

She cuts easily 3/8" flexible conduit and #10,12 ,and14 armored cables with up to 4 wires with a couple of turns of the handle !

I think she will do me just fine on the HVAC side of things !

Sparky got me the 11n1 Klien at my HVAC Parts House, got a Schrader Valve Remover in Her !

Thank You very much Sparky !!!

[sparkyUonline]

@fritzhvac I love buying new cool tools. It's really good to here from you guys when things are going well for you! It is refreshing to see the excitement in your words.

[tomatnite]

Great  Stuff .

[sparkyUonline]

@tomatnite Thank you!

[LandSnipe415]

Thx. I'm a Locol 39 Stationary Engineer & work w/this sometimes. 'Course we don't install much, since that's 4r the iBEw guys, but this helps us usnderstand when there's a short or other need to trouble shoot on the spot which we deal w/all the time. I do sometimes look at the rough-in work when the''re leasing to a new tenant and buildining-out a new floor so I can see 1st hand from the Panel how everything's pup in. But, since I work Swing, this is cool to actually see how it's done. Thx.

[kary1982v6]

KLIEN Tools are the best any way! 

[Megawatts37]

"Redheads" are codes for MC. As you also need them for Greenfield, but try getting those on the site. Slang term for the EMT to MC is a From To.

[sparkyUonline]

@Megawatts37 First off to be clear I use and require my guys to use "redheads". With that being said I looked up references:

320.40 refers to AC cable and does specifie the use of insulators or equivalent. 330.40 refers MC cable and to use fittings listed for such use. No mention of insulators.

I checked some of the mfgs websites and most of the fittings fall under the "listed use"

On another note 1 mfg says under 333.9 you must use anti-shorts?????

Just my findings---

[Megawatts37]

@sparkyUonline When installing ARMORED CABLE (Type AC), NEC article 333-9 mandates the use of a insulating bushing (commonly referred to as Anti-Short or Redhead) between the metal sheath and the conductors. Fittings with insulated throats are not a substitute for the anti-short bushing. I was wrong about the MC part. But it should become code. But yes, it is a good practice to use them no matter what. Fittings with insulated throats I never use. 333.9???????

[sparkyUonline]

@Megawatts37 Well we are all good on the fact that they should be used with M/C.

Now I am going out on a limb here regarding 333-9 my 05 and 11 code book jumps from 332 to 334. Doing a google search I found 333-9 in a 1999 book. Also when I typed 333.9 ??? I meant 333-9.

I don't mind admitting when I am missing something like this and I am not a "code expert" but where is 333-9.

Sorry,don't know the embarrassed symbol.

[Megawatts37]

@sparkyUonline "On another note 1 mfg says under 333.9 you must use anti-shorts?????" 333.9? Unless they were talking about the IEEE code that is an upgrade to the NEC.

[89runner]

you say you love your new 10+1 eh?..have you seen the yellow one made by Ideal with the wire nut driver plus hook benders???...oh and its also ratchet...check it out if ya haven't seen it...i love mine

[sparkyUonline]

@89runner GREAT-now I gotta go and get one!

[89runner]

@sparkyUonline only like 20 bucks..i believe...local supply should have...maybe home depot or lowes

[jasason10]

Thanks a lot for the video! I agree it is a lot faster.....And I think I'll start using them. But it is so weird I've been in the trade for about 15 yrs. and have never seen, come across or used one in the field?

[jjlwis]

cheese and crackers you never cease to amaze me!

Good Stuff!

[acscolo]

I liked this video Sparky because I like working with EMT and MC.

[fidely]

I don't comment very often, but this is priceless info out on the field.

[Rush8101]

In The Video You Had On A Ring Now I Know Is Was Just A How To Video. But Back In My Tech Ed Classes In High School We Was Told Never To Ware Ring and Watches and Thing Like That When Working With Electrical Wiring. Can You Do A Video Some Time and What Is ok To Ware and Not To Ware And The Right Tools To Use When Working With Electrical Wiring. I Think Would Be A Good Video

[sparkyUonline]

@Rush8101 I don't wear my wedding band most of the time when at work. I do wear a watch that is plastic case w/a cloth wrist strap.

I'll put your request on the list for a future video!

Thanks for your comments!

Sparky