Author Topic: Cord work  (Read 5860 times)

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Offline fixit7Topic starter

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Cord work
« on: July 01, 2019, 05:14:10 pm »
It's hard to remember to put shrink tubing on first.

It may not be very clear, but there is a piece of shrink tubing that is ready to slide down and shrunk.

The plan is the use Gardner Bender Liguid tape, 3 coats, then slide the shrink tubing in place and shrink it.

And also 3 coats over a 4 inch section of the cord where the repairs were made.



What do you think?
« Last Edit: July 01, 2019, 05:16:07 pm by fixit7 »
 

Offline Shock

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Re: Cord work
« Reply #1 on: July 01, 2019, 06:34:18 pm »
If it's mains cable don't splice it, replace it. Your splices look really long. Unless length is an issue stagger linesman splices so there is never a possibility of shorting and individually shrink them. The advantage of these splices is they hold up to mechanical strength as well. Then use adhesive lined shrink.
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Offline fixit7Topic starter

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Re: Cord work
« Reply #2 on: July 01, 2019, 07:00:29 pm »
Okay.

I noticed the ground wire is attached to the grinder itself.

Isn't  that supposed to go to the ground on the cable? :-)

If a hot wire were to come loose and touch the metal grinder, then I would be eltro******.

Andy
 

Online Gyro

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Re: Cord work
« Reply #3 on: July 01, 2019, 08:30:17 pm »
I noticed the ground wire is attached to the grinder itself.

You're making no sense. "the ground wire is attached to the grinder itself", ok fine.

Quote
Isn't  that supposed to go to the ground on the cable? :-)
What, the grinder? You just said it was. If not, what's the "that"?
Best Regards, Chris
 

Offline sokoloff

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Re: Cord work
« Reply #4 on: July 01, 2019, 08:53:06 pm »
I noticed the ground wire is attached to the grinder itself.
<snip>
If a hot wire were to come loose and touch the metal grinder, then I would be eltro******.
Well, if a hot wire came loose and touched the metal grinder which is also connected to the ground, you'll blow the breaker from the dead short from line to ground.
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #5 on: July 01, 2019, 09:54:07 pm »
I noticed the ground wire is attached to the grinder itself.

You're making no sense. "the ground wire is attached to the grinder itself", ok fine.

Quote
Isn't  that supposed to go to the ground on the cable? :-)
What, the grinder? You just said it was. If not, what's the "that"?

"That" is the green wire that was connected to the grinder.

The green wire in the cord serves what purpose?
(I know the answer.)


 

Online Gyro

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Re: Cord work
« Reply #6 on: July 01, 2019, 10:02:24 pm »
So you already said that the ground (green) wire is connected to the grinder and "isn't that supposed to go to the ground on the cable" but you already said that it is. See my point?
Best Regards, Chris
 

Offline Brumby

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Re: Cord work
« Reply #7 on: July 01, 2019, 11:40:12 pm »
@fixit7  The fact that you are asking questions like these, makes me rather concerned that you are working on mains cabling.  I knew exactly what went where and why before I first even touched mains cabling.

If it's mains cable don't splice it, replace it.
If it's a flex cable, then replacement is the ONLY safe option.  If it's a fixed cable (inside conduit or secured to an immovable object, like a wall) then splicing is an option.

Quote
... Unless length is an issue stagger linesman splices so there is never a possibility of shorting and individually shrink them.
Please, please, please do this!!!!!  It's one extra step to reduce the risk should one of your splices become exposed.
 
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Offline Monkeh

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Re: Cord work
« Reply #8 on: July 02, 2019, 12:39:44 am »
"That" is the green wire that was connected to the grinder.

The green wire in the cord serves what purpose?
(I know the answer.)

So if the green wire in the cord isn't the green wire connected to the grinder, what the hell is the green wire connected to the grinder?
 

Offline ptricks

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Re: Cord work
« Reply #9 on: July 02, 2019, 12:48:22 am »
replace it, the cost of a new cord is about $5. Even an old ATX power supply cord will work.
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #10 on: July 02, 2019, 12:59:50 am »
replace it, the cost of a new cord is about $5. Even an old ATX power supply cord will work.

I already have a replacement cord.

I made another separate post to make sure I hook it up right.
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #11 on: July 02, 2019, 01:09:16 am »
"That" is the green wire that was connected to the grinder.

The green wire in the cord serves what purpose?
(I know the answer.)

So if the green wire in the cord isn't the green wire connected to the grinder, what the hell is the green wire connected to the grinder?

I agree, my friend, that the green wire as originally installed, served no purpose.

The hot wire and neutral were securely fastened.

I made a separate post showing the loose wires going to the motor, and where the green wire from the OLD cord was fastened to the grinder.

So I could get advice on how to connect the new cord correctly.

I can not find that post?

Hmmmm...

 

Offline Monkeh

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Re: Cord work
« Reply #12 on: July 02, 2019, 01:59:22 am »
"That" is the green wire that was connected to the grinder.

The green wire in the cord serves what purpose?
(I know the answer.)

So if the green wire in the cord isn't the green wire connected to the grinder, what the hell is the green wire connected to the grinder?

I agree, my friend, that the green wire as originally installed, served no purpose.

What was the green wire originally installed and where did it go?!

Your posts are lacking entirely in context. We are not mind readers.
 

Offline sleemanj

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Re: Cord work
« Reply #13 on: July 02, 2019, 02:04:49 am »
You seem to have poor understanding of what the earth wire is for. You really shouldn't be playing with this stuff. 

But anyway, in simple terms, the sole and entire purpose of the green wire is to connect the Earth pin of your power socket to any exposed metal part you can touch on the tool.

Your other thread seems to show that is exactly what it was and should be doing.
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Online MarkF

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Re: Cord work
« Reply #14 on: July 02, 2019, 02:07:35 am »
It would have really been helpful if the grinder cord replacement was all ONE thread.

Here are the other two threads for reference:
   https://www.eevblog.com/forum/beginners/update-grinder-switch/
   https://www.eevblog.com/forum/beginners/record-a-bench-grinder/

Replacement switch:
   (SPST) - ¾ HP 125-250 VAC
   https://www.amazon.com/Gardner-Bender-GSW-110-Electrical-Terminal/dp/B00004WLK6/ref=sr_1_36?keywords=10+amp+ac+switch&qid=1561947300&s=gateway&sr=8-36

Plus images:
   

   

   

   
« Last Edit: July 02, 2019, 02:23:18 am by MarkF »
 

Offline Jwillis

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Re: Cord work
« Reply #15 on: July 02, 2019, 02:57:28 am »
The green wire or Earth ground is there for safety. IF there is a failure in the motor that causes a short to the metal body , the green wire transfers that electrical charge directly to earth ground instead of though you.Connect the green wire to the metal body of the grinder or body of the motor.
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #16 on: July 02, 2019, 03:10:22 am »
The green wire or Earth ground is there for safety. IF there is a failure in the motor that causes a short to the metal body , the green wire transfers that electrical charge directly to earth ground instead of though you.Connect the green wire to the metal body of the grinder or body of the motor.

Ok.
« Last Edit: July 02, 2019, 03:14:04 am by fixit7 »
 

Online MarkF

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Re: Cord work
« Reply #17 on: July 02, 2019, 03:21:02 am »
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #18 on: July 02, 2019, 06:01:36 am »
Thanks. Your artwork is truly impressive. :-)

Would a single pole Leviton 15 amp switch be an acceptable substitute?

It fits the hole the best and I can frame it with some 1/8th inch plywood to fill the gap.





 

Offline sokoloff

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Re: Cord work
« Reply #19 on: July 02, 2019, 10:32:31 am »
If the factory original switch functions, why "improve" upon it?

It was designed for the purpose and has the physical "mash it blindly to turn off the grinder in the event of emergency" benefit.
 

Offline Ysjoelfir

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Re: Cord work
« Reply #20 on: July 02, 2019, 01:17:41 pm »
It was designed for the purpose and has the physical "mash it blindly to turn off the grinder in the event of emergency" benefit.

I mentioned that in the switch replacement thread, too, but fixit7 seems to absolutely want to replace that nice beefy switch for whatever reason.
Greetings, Kai \ Ysjoelfir
 

Online MarkF

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Re: Cord work
« Reply #21 on: July 02, 2019, 03:18:55 pm »
Thanks. Your artwork is truly impressive. :-)

Would a single pole Leviton 15 amp switch be an acceptable substitute?

It fits the hole the best and I can frame it with some 1/8th inch plywood to fill the gap.

My grinder has a toggle switch like the one you linked to and like I used in the picture.
I don't see a problem using a Leviton switch (But, I would not use a cheap one).
A round toggle switch would be easier to mount.   ;)

Instead of plywood, get a plastic (or metal) electrical box cover and trace over your original cover.
Paint to suit.
   https://www.lowes.com/pd/CARLON-2-Gang-Square-Plastic-Electrical-Box-Cover/3129415
I would try to find a piece of plastic or metal.  I would not use wood.
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #22 on: July 02, 2019, 05:08:00 pm »
Thanks MarkF.

Great idea.

I will get the cover like your link.

I can drill holes to match those on the grinder.

I will try to make it look nice.



« Last Edit: July 02, 2019, 05:29:00 pm by fixit7 »
 

Offline fixit7Topic starter

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Re: Cord work
« Reply #23 on: July 02, 2019, 05:12:50 pm »
If the factory original switch functions, why "improve" upon it?

It was designed for the purpose and has the physical "mash it blindly to turn off the grinder in the event of emergency" benefit.

I am not trying to improve on it.

I want a suitable replacement, and if possible use what I already have.

I have a wattometer. I plan on seeing how much is draws in startup.

 

Online MarkF

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Re: Cord work
« Reply #24 on: July 02, 2019, 08:24:48 pm »
This would be a good replacement cord if you don't have one:

https://www.amazon.com/Conductor-3-Prong-Wiring-Replacement-Pigtail/dp/B07MCBPG5V/ref=pd_cp_23_1?pd_rd_w=51HB3&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=J0GJQJV3ZTX7K25A2C68&pd_rd_r=8eecd1ac-9d06-11e9-8864-c1ee86d5769a&pd_rd_wg=02759&pd_rd_i=B07MCBPG5V&psc=1&refRID=J0GJQJV3ZTX7K25A2C68

Otherwise you could buy a short extension cord with 3 prongs and 14/3 AWG wire (three 14 gauge wires).  Then cut it to length for the grinder. 
Sometimes cutting an extension cord in the middle and only using half is cheaper and easier to find.

Depending on the grinder placement in your shop, you may want a long cord.


In order to secure the cord, a plastic cable tie just inside the grinder cord hole will keep it from being pulled out.

https://www.amazon.com/HS-Plastic-Fencing-Outdoor-Purpose/dp/B078NQBSJR/ref=sr_1_19?keywords=cable%2Btie&qid=1562100911&s=gateway&sr=8-19&th=1
« Last Edit: July 02, 2019, 08:59:01 pm by MarkF »
 


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