Objectionable current question.

S

stevenj120volts

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Location
Tommy7rings**
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Master Electrician
In a video demonstration I made i put a load if 67amps in a panel all 67 amps was on one hot and one neutral in the feeder. Then on a branch circuit fed form that panel i made a connection between the neutral and equipment ground at the receptacle. This cause 22 amps of objectionable current to flow thru the connection. Do think that is a sign or other problems or is that what should happen when you make a connection between neutral and ground on the load side of the service disconnecting means ?
 
stevenj120volts said:
In a video demonstration I made i put a load if 67amps in a panel all 67 amps was on one hot and one neutral in the feeder. Then on a branch circuit fed form that panel i made a connection between the neutral and equipment ground at the receptacle. This cause 22 amps of objectionable current to flow thru the connection. Do think that is a sign or other problems or is that what should happen when you make a connection between neutral and ground on the load side of the service disconnecting means ?
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That is what should happen..you have created a parallel path as the EGC is connected to the neutral by the main bonding jumper. You have created a current divider, and the current divides in inverse proportion to the impedance of the two paths.
 
don_resqcapt19 said:
That is what should happen..you have created a parallel path as the EGC is connected to the neutral by the main bonding jumper. You have created a current divider, and the current divides in inverse proportion to the impedance of the two paths.
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Thanks, in the video i explained it as it's what should happen but some comments claimed i was wrong and said I would get ripped apart if I made that claim on mike holt forums
 
stevenj120volts said:
Thanks, in the video i explained it as it's what should happen but some comments claimed i was wrong and said I would get ripped apart if I made that claim on mike holt forums
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Send whoever said you would get ripped apart on the Mike Holt Forum over here. They need some education.
 
stevenj120volts said:
Thanks, in the video i explained it as it's what should happen but some comments claimed i was wrong and said I would get ripped apart if I made that claim on mike holt forums
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Steve,
Although I hate 99% of Facebook videos I'm a big fan of yours (if you are the guy in the videos with a beard) because they always seem accurate (and of course you're from NJ). Facebook in general is a horrible resource for electrical information because it is mostly incorrect.

Can you provide a link to your video? Tell the haters to come here and defend their views. If they're correct we'll agree with them if not, well we'll certain express our opinion.
 
infinity said:
Steve,
Although I hate 99% of Facebook videos I'm a big fan of yours (if you are the guy in the videos with a beard) because they always seem accurate (and of course you're from NJ). Facebook in general is a horrible resource for electrical information because it is mostly incorrect.

Can you provide a link to your video? Tell the haters to come here and defend their views. If they're correct we'll agree with them if not, well we'll certain express our opinion.
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Thanks that me i am from maine. My screen name is Steven Joesph because my day is Steven Gary.
 
infinity said:
Steve,
Although I hate 99% of Facebook videos I'm a big fan of yours (if you are the guy in the videos with a beard) because they always seem accurate (and of course you're from NJ). Facebook in general is a horrible resource for electrical information because it is mostly incorrect.

Can you provide a link to your video? Tell the haters to come here and defend their views. If they're correct we'll agree with them if not, well we'll certain express our opinion.
Click to expand...
www.facebook.com

758 reactions · 34 shares | Neutral and ground are not the same thing##electricianofinstagram #electrician #electrician_life #donttrythisathome | Stevenj120volts

Neutral and ground are not the same thing##electricianofinstagram #electrician #electrician_life #donttrythisathome.
www.facebook.com www.facebook.com
 
letgomywago said:
It was objectionable current till it lost its nuetral from a side job gone wrong panel change we had to fix and swap out.View attachment 2578473
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Yup sounds about right !! That’s why creating that parralell path and violating 250.24(b) can be so dangerous , since theres essentially no difference in potential between grounded/grounding conductors , when you have a good neutral connection there’s hardly any voltage to push the amperes of objectionable current through that parallel path but as soon as the neutral is compromised watch out lol
 
ptonsparky said:
I suspect this was more than a lost neutral. Side job gone wrong would be an understatement.
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So from our forensics.
They had ground bushing on rigid nipple with a bare SBJ to the ground bar

They had a nuetral to the meter can

Nuetral had a snapped lug floating above the nuetral bar in main panel

No green screw in main panel

GEC was bare and hit nuetral after running along with the bare grounds in the panel tightly together

This we belive ran all nuetral current through the bare grounds and EGC barely touching. Then through the ground bar and SBJ on the ground bushing. Then through the locknut in the meter. Finally through the rivets on the back of the meter can holding the meter jaws that's bonded to the nuetrals from the utilities.
 
I got some help from the experts on here a while back where a large 208 service had been changed out to a multi unit hi-end building the some guys working on gas pipe got a spark taking the pipe apart they discovered a few amps on the pipe. It's 208 to the building, single phase to the apartments.
Since the ranges in the building were fancy gas / electric ranges they made a N-G bond to the gas pipe in each range (old 3-wire range receptacles).
Funny thing is it complied with the 2023 code as they still allow a 3-wire range and dryer receptacle.
The recommended 'fix' is illegal here in MA they have a code amendment deletes the section allowing the fix, so the only legal fix in MA is to rewire.
 
pipe_bender said:
I got some help from the experts on here a while back where a large 208 service had been changed out to a multi unit hi-end building the some guys working on gas pipe got a spark taking the pipe apart they discovered a few amps on the pipe. It's 208 to the building, single phase to the apartments.
Since the ranges in the building were fancy gas / electric ranges they made a N-G bond to the gas pipe in each range (old 3-wire range receptacles).
Funny thing is it complied with the 2023 code as they still allow a 3-wire range and dryer receptacle.
The recommended 'fix' is illegal here in MA they have a code amendment deletes the section allowing the fix, so the only legal fix in MA is to rewire.
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Does each apartment have a service disconnect because if not they shouldn't have had a non grounded outlet if it was always from a sub panel.
 
letgomywago said:
Does each apartment have a service disconnect because if not they shouldn't have had a non grounded outlet if it was always from a sub panel.
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Yes its a old building, there is a large new meterpack each apartment has a feeder from the meter pack. My boss concluded the code allows a old 3-wire range NEMA 10-50 (or dryer 10-30) receptacle to remain in a 'subpanel' with the local AHJ here, and it had previously passed an inspection.
 
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