Electrical tape

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Samuel87

Member
Location
Fresno CA
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Electrician
Electrical tape may be used to cover splices and the free ends of conductors. ?

I went to see 110.14 (B) and they said “insulation equivalent to that of the conductors ”

Thanks.
 

jaggedben

Senior Member
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Northern California
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Solar and Energy Storage Installer
Before Polaris type insulated terminal blocks were readily available, it was common to do taps or splices of large wires with split bolts or c-taps and lots of tape. The thick rubber insulating tape was often used first with the thinner stuff (i.e.what is commonly meant by 'electrical tape' nowadays) wrapped over it to keep it firmly in place.
 

letgomywago

Senior Member
Location
Washington state and Oregon coast
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residential electrician
Before Polaris type insulated terminal blocks were readily available, it was common to do taps or splices of large wires with split bolts or c-taps and lots of tape. The thick rubber insulating tape was often used first with the thinner stuff (i.e.what is commonly meant by 'electrical tape' nowadays) wrapped over it to keep it firmly in place.
I still do this for the odd time I use a split bolt. Cheap tape backwards then forwards, few rubber layers, and then cheap tape again. I don't do motors really so ignore not having fiberglass or cambric in there.
 

tom baker

First Chief Moderator & NEC Expert
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Location
Bremerton, Washington
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Master Electrician
Before Polaris type insulated terminal blocks were readily available, it was common to do taps or splices of large wires with split bolts or c-taps and lots of tape. The thick rubber insulating tape was often used first with the thinner stuff (i.e.what is commonly meant by 'electrical tape' nowadays) wrapped over it to keep it firmly in place.
Operative words "lots of tape"
 

tom baker

First Chief Moderator & NEC Expert
Staff member
Location
Bremerton, Washington
Occupation
Master Electrician
I had to pull new wires to a 100 HP fire pump, 460 volt. Original connection was with split bolts and rubber insulating tape. The tape got all into the split bolt and wire strands. Took a long time to clean it off the pump wires. The tip for youngsters is to use a few wraps of 33 sticky side out. Then insulating tape and 33. Better yet use T&B motor stub boots
 

don_resqcapt19

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Staff member
Location
Illinois
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retired electrician
I still do this for the odd time I use a split bolt. Cheap tape backwards then forwards, few rubber layers, and then cheap tape again. I don't do motors really so ignore not having fiberglass or cambric in there.
If you install the rubber per the instructions, there is no need for fiberglass or cambric under the rubber. The instruction say to wrap sticky side out. It comes right off without sticking to the terminations, if you slit it and spread it open with two pair of pliers.
 

Samuel87

Member
Location
Fresno CA
Occupation
Electrician
I want to say thanks for your commentaries, and I could say that electrical tape is going to work as equivalent of the insulation. I am going to have in mind that electrical tape has the right characteristics, thanks.
 

Fred B

Senior Member
Location
Upstate, NY
Occupation
Electrician
I want to say thanks for your commentaries, and I could say that electrical tape is going to work as equivalent of the insulation. I am going to have in mind that electrical tape has the right characteristics, thanks.
So you're the guy taking a piece of bare #4 EGC and wrapping some tape on it and use it as an insulated conductor.
Not all "electric" tape is created equal.
 

jap

Senior Member
Occupation
Electrician
So you're the guy taking a piece of bare #4 EGC and wrapping some tape on it and use it as an insulated conductor.
Not all "electric" tape is created equal.

I would say if he's wrapping a #4 bare he'd be wrapping a GEC..... :)

Jap>
 
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