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    Load Calc with Shower Steam Unit

    197A[/COLOR]

    #2
    Check it with MH's residential load calculator online. Once at the link scroll down to residential load calculator.
    They say I shot a man named Gray and took his wife to Italy
    She inherited a million bucks and when she died it came to me
    I can't help it if I'm lucky

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      #3
      Try this software program. http://www.theelectricalguru.com/dwellingcalc.xls

      You missed disposal, trash compactor, ice maker, others.

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        #4
        Originally posted by bob View Post
        You missed disposal, trash compactor, ice maker, others.
        Maybe the house doesn't have them. Outside the city where you have septic fields you cannot have a disposal around here. TC and IM are not on everyones wish list.
        They say I shot a man named Gray and took his wife to Italy
        She inherited a million bucks and when she died it came to me
        I can't help it if I'm lucky

        Comment


          #5
          Originally posted by bob View Post
          Try this software program. http://www.theelectricalguru.com/dwellingcalc.xls

          You missed disposal, trash compactor, ice maker, others.
          These are plain old folks around here. Nothing fancy.

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            #6
            http://forums.mikeholt.com/showthread.php?t=127901

            Check that thread out from yesterday, Charlie b spelled it out pretty well. Add your steam shower separately.

            It appears your using the nameplate value for a lot of your values, I would be careful doing that. At least use 1500VA for your microwave & 5000 VA for your dryer & 1500VA for your dishwasher. All those appliances are easily replaceable.

            Just my opinion.

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              #7
              Heres a PDF of my load calculation I typically use for residential.

              The bottom may be the most confusing thing, but basically you subtract 10KW from your loads, then take the remainder at 40%.

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                #8
                That is using the optional calculation. I don't think you can take the range at 8KW when using the optional calculation -- needs to be nameplate value. I think the OP will get a much smaller load calculation with the Optional Calculation since a 40% factor applies to most items. With the standard calculation, it is going in at 100%, or 75% if you can happen to find 3 other appliances to use for the 4 or more demand.
                Mark
                Kent, WA

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                  #9
                  the optional load calculation does make you use name plate value for the range, however your wrong about the 75% demand factor. See example D2(a), page 1344 if you have the handbook.

                  The demand factor for the optional calculation is the calculated VA - 10KW + REMAINDER @ 40%

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                    #10
                    The EE I use sometimes e-mailed back and said that I needed to add the steam unit in the second half with my A/C's which puts my calc at 245A-ish.

                    He also said that the original calc at 197 would make them (his firm) go ahead and call for a 400A service. CYA thing for them.

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                      #11
                      Originally posted by Npstewart View Post
                      http://forums.mikeholt.com/showthread.php?t=127901

                      Check that thread out from yesterday, Charlie b spelled it out pretty well. Add your steam shower separately.

                      It appears your using the nameplate value for a lot of your values, I would be careful doing that. At least use 1500VA for your microwave & 5000 VA for your dryer & 1500VA for your dishwasher. All those appliances are easily replaceable.

                      Just my opinion.
                      I had looked at that. I still wasn't sure how to handle the Steam Unit.

                      Comment


                        #12
                        Originally posted by Npstewart View Post
                        the optional load calculation does make you use name plate value for the range, however your wrong about the 75% demand factor. See example D2(a), page 1344 if you have the handbook.

                        The demand factor for the optional calculation is the calculated VA - 10KW + REMAINDER @ 40%
                        The stove was 7.5Kw @240V. I just left the 8Kw.

                        Comment


                          #13
                          Originally posted by Npstewart View Post
                          the optional load calculation does make you use name plate value for the range, however your wrong about the 75% demand factor. See example D2(a), page 1344 if you have the handbook.

                          The demand factor for the optional calculation is the calculated VA - 10KW + REMAINDER @ 40%
                          The 75% factor I was mentioning is for the STANDARD calculation when you have 4 or more appliances fastened in place [220.53].
                          Mark
                          Kent, WA

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