โJun-05-2013 08:53 AM
โSep-25-2013 09:08 AM
john&bet wrote:jeepman71 wrote:DON'T DON'T do it unless it has 4 poles or hole in the outlet. YOU MUST have a NEUTRAL period.
I am currious, if my rv were a 50amp system and I plug into a 220V welder or dryer outlet what will I find? What different circuits or equipment would likely be damaged?
Let's assume that this rv is a very late model like a 2012.
I don't have to worry because mine is only a 30amp.
โSep-25-2013 09:06 AM
jeepman71 wrote:DON'T DON'T do it unless it has 4 poles or hole in the outlet. YOU MUST have a NEUTRAL period.
I am currious, if my rv were a 50amp system and I plug into a 220V welder or dryer outlet what will I find? What different circuits or equipment would likely be damaged?
Let's assume that this rv is a very late model like a 2012.
I don't have to worry because mine is only a 30amp.
โSep-25-2013 08:59 AM
sdetweil wrote:
Ok, I'm the guy that found out. RV 50 amp into 60 amp Welder service with no neutral..
big Pop when the A/C tried to come on. wish it was a circuit breaker.. no such luck.
something smells near the converter/breaker panel. not wire smell, electronics smell. maybe blown converter.
obviously the smaller ground couldn't take the load. maybe it will be a blown ground wire. (probably wishful thinking).
far as I can tell everything works (on 110 adapter to 50amp plug) except the fridge electric circuit. lights, fantastic fans, 110 outlets. haven't tried slides or leveler yet.
I will disconnect all power today and pull the breaker panel out to look at the wires behind.
diagnosis advice welcomed. will also run a separate 6/3 circuit.
โSep-22-2013 08:04 AM
smkettner wrote:KMLsquared wrote:
I might be mistaken but I did not think the utility even provided a neutral?
Yes standard single phase service provides 240v and the transformer center tap as the neutral. The main distribution panel needs to have its own earth ground.
โSep-22-2013 07:57 AM
โSep-22-2013 07:25 AM
greende wrote:
Sorry this happened to you. I don't have any words of wisdom except to begin checking everything with your multimeter and add up the damage. Stay in touch and let us know. To my knowledge the combined neutral & ground together is no longer recommended for new installations like Dryers and welders but someone who has bought a new welder recently may be able to confirm this. If you had a four wire welder outlet, an RV would run off it with the appropriate adapter as the ground & neutral are separate.
โSep-22-2013 06:58 AM
โSep-22-2013 05:51 AM
โJul-04-2013 04:48 PM
goukcats wrote:
Kinda on the same subject... I am having a box & wiring installed for a double pole 220 outlet for a hot tub. I already have a 30 amp plug for my 5er but was wondering if I could use the same wire (hot tub wire) also for a 50 amp RV box. I assume I couldn't use both at the same time but would that work? Thanks...
โJul-04-2013 04:04 PM
โJul-04-2013 02:52 PM
โJul-04-2013 02:24 PM
โJul-04-2013 01:22 PM
RoyB wrote:Roy, the ground(green wire) in a sub panel has to be separate from the neutral per the NEC. It is the same way in all tt,5th,modular homes.
Maybe this helps....
This is how a typical house is wired with a split phase (aka single phase) 3-wire 120V/240V service wiring.
Most residential and light commercial homes in U.S. have a single-phase 3-wire 120V/240V service. It consists of two inverted relative to each other lines and grounded neutral. Connecting an electric load between any line and the neutral yields 120 volts AC. Connecting between both lines yields 240 volts AC. The two 120V lines are derived from a step-down distribution transformer, which is usually mounted on a pole. Its secondary winding has a grounded center tap connected to neutral wire. The two end terminals are electrically โhotโ with respect to the neutral. Note that both lines are derived from the same utility phase. Thatโs why such configuration is often called โsplit phaseโ. The three conductors go from the pole to your electric meter. From the meter they run to the panel containing the main service disconnect. From there the lines go to magnetic circuit breakers that protect individual branches. The branch breakers can be mounted in a separate distribution panel or can be incorporated into the main panel.
(This is from google search source)
Maybe someone can take this and explain how to use the 240VAC WELDER connection to be used for a RV50 AMP four wire connection where the RV 50AMP Shore Power cable can be plugged into this house system shown....
What confuses me is when installing the sub panel as shown below is where the "GREEN" Earth ground goes. Notice Earth ground is connected directly to the main panel shown above NEUTRAL Connection.. The Earth ground and the NEUTRAL are separated in the sub panel connections.
Roy Ken
โJul-04-2013 08:14 AM
RoyB wrote:
qtla9111 - if that was responding to what I just posted you are probably right... I should get out of the mix I guess... I might want to wire in a sub-panel myself someday and right now I don't know what to do with the "GREEN" Earth Ground wires. Always been under the assumption you should only have one earth ground and in this case that would be at the meter location. We just had a lightning strike near miss here a couple weeks back so I got to watch the Power Company troubleshoot my NEUTRAL and EARTH GROUND connections. They found a LOOSE NEUTRAL GROUND connections and fixed that - all is normal again now in my house 120VAC circuits. My house is wired just like the top diagram in my other post...
INteresting at the least...
Roy Ken
โJul-03-2013 05:19 PM