wiring harbor freight air compressor - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Garage - Tools
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-11-2011, 11:54 AM
Registered User
 
Join Date: Oct 2011
Location: south fl
Posts: 3
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
wiring harbor freight air compressor

I'm going to pick up the 60 gal 5hp harbor freight air compressor. Manual says it needs a 40 amp circuit breaker. I have a 220 line with a 50 amp 4 wires 2 black 1 red 1 green. it had been powering a electric stove in garage when there was a duplex in garage.

Will this wire up to the air compressor without any other changes? Their instructions say its a 4 wire set up.

Keep in mind i'm new to this wiring.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-11-2011, 01:13 PM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 56
Posts: 4,948
Wiki Edits: 26

Thanks: 2
Thanked 76 Times in 64 Posts
Quote:
Originally Posted by toddjg
I'm going to pick up the 60 gal 5hp harbor freight air compressor. Manual says it needs a 40 amp circuit breaker. I have a 220 line with a 50 amp 4 wires 2 black 1 red 1 green. it had been powering a electric stove in garage when there was a duplex in garage.

Will this wire up to the air compressor without any other changes? Their instructions say its a 4 wire set up.

Keep in mind i'm new to this wiring.
You should call an electrician if you are not 100% sure of what you are doing. You will need to at a minimum change the breaker. If the wiring and other components in the compressor at rated for 40 amps and you are on a 50 amp breaker, the compressor wiring will melt and burn before the breaker trips.
__________________
Artificial Intelligence is no match for Natural Stupidity



Chet
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-11-2011, 03:18 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,908
Wiki Edits: 0

Thanks: 0
Thanked 6 Times in 6 Posts
You are talking about the US General? There has been a lot of discussion about those compressors and how well they compare to a lot of other brands sold at various places. Since the last time I was in a discussion here about them I helped a friend of mine who runs a dairy farm install one to replace an old Brunner compressor from the 1950's since he had updated his equipment and needed a more reliable air supply. The unit was only supposed to be for occasional use, about what one might expect in a home shop, but more equipment was added and this thing has been seeing almost constant duty for several months now which it is doing without so much as a whimper! For what it cost it has, IMO, far exceeded what should be expected of it and so far shows no signs of giving up. Just thought you might like to know that!



I agree that the best advice on the wiring is what T-Bucket already said.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-11-2011, 05:40 PM
Registered User
 
Join Date: Oct 2011
Location: ohio
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
h.f air comp.

ive been doing elect. for a long time 30 yrs. never heard of a 4 wire air comp. unless its 3 ph still dont need all 4 to make it run # 8 romex copp. is good for 40 amps what kind of wire do you have alum. our copp. mine is 7 1/2 hp 50 amp breaker never failed me knock on wood 2 hots and ground is all you need
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-11-2011, 09:21 PM
OneMoreTime's Avatar
Hotrodders.com moderator
 
Last wiki edit: Health and safety in the shop or garage
Last journal entry: Yard Dog pic
Last photo:
Join Date: Jul 2004
Location: Washington State
Age: 69
Posts: 7,025
Wiki Edits: 3

Thanks: 24
Thanked 98 Times in 94 Posts
Updated electrical code

The 4 wire system is an update to the electrical code..One wire the green is attached to the frame of the equipment to provide a positive ground. the white is the neutral and goes to the neutral at the switch and the hots which are red and black go the contactors of the switch..A lot of the new homes and buildings have 4 wire systems these days..Still have an electrician come in if you are not sure on wire sizing and such..

Sam
__________________
I have tried most all of it and now do what is known to work..
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-14-2011, 05:24 PM
Old Fool's Avatar
Registered User
 
Last photo:
Join Date: Jan 2008
Location: spokane,wa.
Posts: 1,311
Wiki Edits: 0

Thanks: 8
Thanked 31 Times in 29 Posts
Quote:
Originally Posted by T-bucket23
You should call an electrician if you are not 100% sure of what you are doing. You will need to at a minimum change the breaker. If the wiring and other components in the compressor at rated for 40 amps and you are on a 50 amp breaker, the compressor wiring will melt and burn before the breaker trips.
The circuit breaker only protects the wiring to the device, not the device.
It is sized for the wire connected to the breaker, not the wire size of the device.

The device may have its own protective device such as a motor overload breaker.

Think of it this way, a house is wired with 12/2wg and has 20 amp breakers for the receptacles. You almost always plug in devices that are not 20 amp loads. You never worry about the wire on the toaster melting because the breaker was to big for the cord on the toaster.
Reply With Quote Quick reply to this message

Recent Garage - Tools posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Harbor Freight Compressor matt167 Garage - Tools 13 09-28-2012 08:12 AM
Harbor Freight eloc431962 Hotrodders' Lounge 27 11-05-2009 11:13 AM
i need a cheap beginner welder and air compressor. harbor freight? jagarcia05 Garage - Tools 64 07-13-2009 09:18 PM
Harbor Freight TIG oldred Garage - Tools 54 02-22-2009 05:00 PM
Harbor Freight Coupon 3100 Special Garage - Tools 0 10-19-2005 04:08 PM


All times are GMT -6. The time now is 11:20 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.