I wish to differ slightly with Larry. If you need a new cord and since the recptacle is cheap I would change it out to 4 wire.
Not with a 3-wire circuit!I wish to differ slightly with Larry. If you need a new cord and since the recptacle is cheap I would change it out to 4 wire.
Not with a 3-wire circuit!
If the supplying circuit is 3-wire, a 4-wire receptacle should not be installed.When a 3 -wire was allowed the common method here was to use 6 AWG AL SE cable for ranges & dryers so no 4-wire option avail.
I wish to differ slightly with Larry. If you need a new cord and since the recptacle is cheap I would change it out to 4 wire.
The frame of the oven should not be bonded to the nuetral as EMF and net currents could increase and cause problems with RF as well as some people complain of health issues.
This goes along with the fact that many motion sensors do not have nuetral connection and use ground as a conductor. The UL allows this but when you miltiply this by many devices in home/office to save energy you wind up with large ground currents. You may even have issues with AFCI breakers. Fortunatly most motion sensor companies are providing more choices of devices with nuetrals.
I believe many say anything over 2 mg is not good but that would depend on where the readings were made from.I worked with a company called Field Management. They would get referrals from the POCO. Every instance that there were unnecessary levels of EMF it was allways due to Nuetral to ground connections. That is every call I was on. If I remenber we saw anywhere between 10 an 20 MG
I worked with a company called Field Management. They would get referrals from the POCO. Every instance that there were unnecessary levels of EMF it was allways due to Nuetral to ground connections. That is every call I was on. If I remenber we saw anywhere between 10 an 20 MG
I believe many say anything over 2 mg is not good but that would depend on where the readings were made from.
Neutral to ground connection past the load will cause unnecessary EMF's. Two neutrals from different circuits that are tied together after the load will also cause emf's as well as neutrals not run together with the ungrounded conductor.
Whew!I never meant to place a 4 wire recept on a 3 wire cable nor did I mean to pull a new wire.
Many of those I've seen had 10-3 without ground, too. Either way is correct.In most all the installations I have seen a 3 wire plus ground was used and the nuetral tied to the frame using a 3 pole range outlet.
That's still wrong. A sub-panel is like a mobile-home service, which has required major appliances on 4-wire circuits for many years.Most of these instances where fed from a sub panel.
Whew!
Many of those I've seen had 10-3 without ground, too. Either way is correct.
That's still wrong. A sub-panel is like a mobile-home service, which has required major appliances on 4-wire circuits for many years.
Those installs with the 3 wire no ground originated from sub panels without seperate ground and nuetral. In other words bonded nuetral sub panel .
The real doosy was a 10-2 that was on a three prong outlet and fed from a sub panel.
I told the customer no can do need to add a new wire 10-3 w ground or she could get a dryer that is 240 only.
Help me understand.
Old code that allowed a 3 prong for the dryer or range.
Why could it not be feed from a subpanel?
If you connect an old three wire to a sub panel where would you land the neutral/ground....? Remember these cables had to be a seu or ser cable-- obviously 3 wire it was an seu cable. Where would you land the bare conductor?
Help me understand.
Old code that allowed a 3 prong for the dryer or range.
Why could it not be feed from a subpanel?
My belief is because the main panel is where the neutral is bonded, and we're relatively sure that point is zero volts to earth, whereas in a sub-panel, where the neutral and EGC are (supposed to be) separate, we can not presume that.Why could it not be feed from a subpanel?