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leg one, leg two question - Printable Version +- Wanderlodge Gurus - The Member Funded Wanderlodge Forum (http://www.wanderlodgegurus.com) +-- Forum: Yahoo Groups Archive (/forumdisplay.php?fid=61) +--- Forum: WanderlodgeForum (/forumdisplay.php?fid=63) +--- Thread: leg one, leg two question (/showthread.php?tid=664) |
leg one, leg two question - jvicars4 - 05-21-2005 23:22 I am trying to understand how leg one and leg two work in the coach. I looked at the guages and leg one and leg two both have 120plus voltages but I only notice amps being used on leg one when under normal operation (one air, chargers). I have not noticed leg two showing amp draw. I would expect some of the items on the coach would be on leg two but I have not seen it drawing amps. Please let me know what to expect. Thanks. Jamie 1995 pt 42 leg one, leg two question - George Lowry - 05-22-2005 03:30 Jamie, I have the same thing with my '95 WBDA. A simple explanation of how it is supposed to work: We have "50 amp" service which is in reality two 120 Volt lines servicing the coach. I.e., Each of the hot leads, when connected to the neutral give 120 volts. BTW, each is capable of 50 amps or we have a total of 100 amps possible at 120 volts. In the distribution box, each hot lead is connected to one buss which then feeds their respective circuit breakers. If designed and wired correctly, the two busses should have equal loading. On the input cables to the master circuit breakers there is a toroid coil which is the sensor for the ammeters. Since we have current flow showing on leg one, but none on leg two, yet everything works, I suspect that the problem is in the indicating system. BTW, I should mention that our coach is all electric with electric cooking etc. which is even more important to have balanced loads. I have yet to trouble shoot the indicating system (hasn't reached the top of the list yet), but it could be the sensor (toroid coil), the wiring, or the ammeter itself. If you have access to a clampon ammeter, you can assure current flow in the circuit. Checking continuity on the wiring and the meter itself should not be difficult. Hope this helps, George Lowry '95 WBDA 4203 & GM 4106 (for sale) Spearfish, SD jvicars4 wrote: > I am trying to understand how leg one and leg two work in the coach. I > looked at the guages and leg one and leg two both have 120plus voltages > but I only notice amps being used on leg one when under normal > operation (one air, chargers). I have not noticed leg two showing amp > draw. I would expect some of the items on the coach would be on leg two > but I have not seen it drawing amps. Please let me know what to > expect. Thanks. > > Jamie > 1995 pt 42 > > > > > > > Yahoo! Groups Links > > > > > > > > > leg one, leg two question - Jeff Miller - 05-22-2005 05:19 Try the other A/Cs, one of them should be on L2. - Jeff Miller --- In WanderlodgeForum@yahoogroups.com, "jvicars4" wrote: > I am trying to understand how leg one and leg two work in the coach. I > looked at the guages and leg one and leg two both have 120plus voltages > but I only notice amps being used on leg one when under normal > operation (one air, chargers). I have not noticed leg two showing amp > draw. I would expect some of the items on the coach would be on leg two > but I have not seen it drawing amps. Please let me know what to > expect. Thanks. > > Jamie > 1995 pt 42 leg one, leg two question - pattypape - 05-22-2005 05:24 Jamie, Crank on all the A/C's and/or a couple of electric heaters. This show some high current draw from both legs. If the ammeter is still dead, you probably have a defective meter, sensing coil in the AC load center panel or a loose/frayed wire. You may be able to swap the two amp gages. Bill 88 FC Michigan --- In WanderlodgeForum@yahoogroups.com, "jvicars4" wrote: > I am trying to understand how leg one and leg two work in the coach. I > looked at the guages and leg one and leg two both have 120plus voltages > but I only notice amps being used on leg one when under normal > operation (one air, chargers). I have not noticed leg two showing amp > draw. I would expect some of the items on the coach would be on leg two > but I have not seen it drawing amps. Please let me know what to > expect. Thanks. > > Jamie > 1995 pt 42 leg one, leg two question - beancounterman - 05-22-2005 06:56 Actual, the "equal loading" issue can be confusing. If properly designed, the system should split the loads so that under most foreseeable operating conditions, neither leg is overloaded, and under the most common conditions, the loads are roughly even. But the design of the electrical system cannot anticipate the variety of different situations the operater will encounter and therefore how the operator will respond. For example, on a typical coach with three roof airs, one air will be on one leg, and two on the other. If the operator wishes to run two a/c's, the total load will either be on one leg or split between two, depending on which a/c's are running and which a/c is not. Wiring 120 volt resistence heaters presents the same situation, that is, the loads on the legs and their "balance" will be determined by which heaters are turned on. It has also been my experience that this is not an issue unless one or the other leg is exceeding 50 amps while the other leg under utilized under "normal operating conditions." Relax unless you are seeing an overload. Beancounterman --- In WanderlodgeForum@yahoogroups.com, George Lowry > Jamie, > > .......... If designed and wired > correctly, the two busses should have equal loading...... > > > Yahoo! Groups Links > > > > |