Everyone. When talking about a 220V outlet FORGET about what it may or may not do at the breaker box. A 3 prong 220V outlet is 2 hot and GROUND. A 4 prong 220V outlet (also called 110V/220V) has a ne
Mike, AMEN! You have to use a 4 wire cord if you intend on having access to 120 and 240 vac from the same source. NEC rules does not allow using a neutral for a hot, plus you need a ground. The NEC a
Your safest bet is to run 4 conductor wire and outlets. All new ranges and dryer circuits must be 4 wire. As far as I am concerned, all new amplifier circuits should be too. Mike, W1NR Many amps like
On Nov 15, 2005, at 3:02 PM, Mike McCarthy, W1NR wrote: Everyone. When talking about a 220V outlet FORGET about what it may or may not do at the breaker box. A 3 prong 220V outlet is 2 hot and GROUND
However, in the event that some outside force* manages to sever both the safety-ground wire as well as the neutral wire, a 5-wire system with two safety ground wires would be safer. * - such as the s
As is normal- I do not take much that Measures says as gospel- How many pieces of equipment, wired for 220 or 240, have you seen that have internal 120 usage? I have one dryer that has a 220 heater a
safety NO, NO, NO, NO, NO! Neutral is intended to carry current (although it is not used in the 240 volt circuits in homes). Ground is a PROTECTIVE conductor that should NOT carry current except in t
In a SB-220 or a TL-922, it's Yes, yes, yes! because there is no connection between the 120v fan and either side of the 240V input. Instead, the fan is powered by one of the 120v primaries of the xfm
In a SB-220 or a TL-922, it's Yes, yes, yes! because there is no connection between the 120v fan and either side of the 240V input. Instead, the fan is powered by one of the 120v primaries of the xfm
Neutral is intended to carry current (although it is not used in the 240 volt circuits in homes). Ground is a PROTECTIVE conductor that should NOT carry current except in the case of a fault. (A faul
As is normal- I do not take much that Measures says as gospel- How many pieces of equipment, wired for 220 or 240, have you seen that have internal 120 usage? I have one dryer that has a 220 heater a
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I'm not sure that is the "safest" approach, event though it is allowed by NEC. IMO, the safest system is to use two hots and a safety ground, and no
The wiring manual I use states the following: A) A 120/240-volt, 30 amp receptacle (4 wires); connect the white wire to the white receptacle terminal. Connect the red and black cable wires to recepta
However, if a neutral is in place, and it is bonded to the cabinet, in the rare event that the safety-ground is severed, the cabinet could not possibly become a shock hazard. Since many ovens and dry
Alphonsus Cassell (Tito Puentes) - "Hot! Hot! Hot!" I'm glad to know that the quadrillions of dollars of real estate in the US is protected by volunteers. My office is about 100 yards from Raytheon H
However, if a neutral is in place, and it is bonded to the cabinet, in the rare event that the safety-ground is severed, the cabinet could not possibly become a shock hazard. If it is bonded to the c
The wiring manual I use states the following: A) A 120/240-volt, 30 amp receptacle (4 wires); connect the white wire to the white receptacle terminal. Connect the red and black cable wires to recepta
If it goes to the neutral buss of the mains, it's a neutral. It's a violation to exceed 65mph on a California freeway when you look in the rear-view mirror and see a 747 with engines aflame setting d
You are trying to make it complicated when it is not. Suppose your neutral does open with a four wire circuit, your 120 volt fan just stops running. Same thing happens to your 240 volt power supply
Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Date: Thu, 17 Nov 2005 09:45:34 +0100 (CET)
standards are often doing so on a voluntary basis.< I've been professionally involved with standards production in both the US and Europe over about the last 15 years, and would only say Jim is parti