I’m going to double check on this but I believe u add the large motor at fizz appliance at 100% and went you look for the larger motor you add it againg but just at 25% so there get you 125%
In the appliance video before, we calculated 3 at 100%. Then we added the compactor as a 4th. So we calculated it at 75%. So in that video we used the total we got after doing the 75% which was 6119.25. The compactor is the largest motor ( 1587VA) , so do we multiply that by 125%?? You said 25% because we already did 100%. But I’m confused cause we used the total that we got from 75% because of the 4 appliances
what about the water heater? its 5000VA shouldnt that be the bigger motor? Also I think hes saying that Compressor itself is 1587VA so you add 25 percent to it. 75 percent is if you calculated 4 or more appliances. Hes just looking for 1 appliances that has the biggest motor. I think thats whay hes trying to say
Read the label where it says watts.. now figure out if the minisplit is 120v or 240.. now divide the watts by either 120 or 240 and that would be your amperage.. now if it's 11 amps or less you can use a 15 amp breaker.. if it's 16 amps or less you have to use a 20 amp and 12 gauge wire..
I really don't know anyone that accounts that motor load calculation when the largest motor is also accounted for in the fixed appliance calculation. Seems like everyone does the largest motor load calculation at 125% as opposed to 25%. Not sure what is correct. The motor is acting as both a fixed appliance but it also must be considered when sizing motor loads. So it seems to me that the largest motor should be calculated twice. Once at 100% in fixed appliance and then separately in motor loads as largest motor at 125% again. Anyone?
Wow, I cant believe I went a year and not ever noticed that!! Thank you for pointing that out. Its nice to see people are paying attention!! Guess it never occurred to me seeing it was irrelevant anyway!! Thanks for watching!! CM
@@craigmichaud-electricalins4602 It might not be that impt coz its only a writing error but for the sake of argument that you"re demonstrating calculations the numbers should add up. I enjoyed watching your video its very informative but for your future audience maybe 100,000 people you dont want to confuse them to subscribe on your channel
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Man is a good instructor
Man knows his stuff
noticed a math error when calculating watts for air handler 17.2 A (x) 120V = 2064 VA (NOT 2040)
It happens!! I cut the wrong clip!! Thanks for the point out and the comment! CM
I’m going to double check on this but I believe u add the large motor at fizz appliance at 100% and went you look for the larger motor you add it againg but just at 25% so there get you 125%
Pure gold
How would you calculate this with a multi zone ductless mini split A/C with a heat pump ?
Thanks so much.
Thank you!
Thanks
So if we have a gas furnace, then A/C can be calculated for the largest motor because the Heat VA is Zero?
In the appliance video before, we calculated 3 at 100%. Then we added the compactor as a 4th. So we calculated it at 75%. So in that video we used the total we got after doing the 75% which was 6119.25. The compactor is the largest motor ( 1587VA) , so do we multiply that by 125%?? You said 25% because we already did 100%. But I’m confused cause we used the total that we got from 75% because of the 4 appliances
what about the water heater? its 5000VA shouldnt that be the bigger motor? Also I think hes saying that Compressor itself is 1587VA so you add 25 percent to it. 75 percent is if you calculated 4 or more appliances. Hes just looking for 1 appliances that has the biggest motor. I think thats whay hes trying to say
@@trevorfoster4010 75 percent demand, 125 percent for load calc of largest motor. Ok?
Amercan and your country use same nec code book?
What if all I know is the HVAC is 3.5 ton AC system 240V, 17.9A and air handler is 3.3A
Thank you shearing awesom video.
Whould you please not stand front of number you wrote please cant see it sir
I would like to know how to size for mini split units im having trouble knowing what to plug in. Please reply
Read the label where it says watts.. now figure out if the minisplit is 120v or 240.. now divide the watts by either 120 or 240 and that would be your amperage.. now if it's 11 amps or less you can use a 15 amp breaker.. if it's 16 amps or less you have to use a 20 amp and 12 gauge wire..
You should keep the NEC term “125%” and not saying “adding 25%”, I got some apprentices who asked me where that 25% come from.
The explanation is in the video. This is a question that I will be adding to my FAQ videos. Thanks for the comment. CM
Instablaster
Isn’t 6x15 =90?im sorry.
how would you convert 3.5 ton AC system to VA?thanks!
Amps times volts
I really don't know anyone that accounts that motor load calculation when the largest motor is also accounted for in the fixed appliance calculation. Seems like everyone does the largest motor load calculation at 125% as opposed to 25%. Not sure what is correct. The motor is acting as both a fixed appliance but it also must be considered when sizing motor loads. So it seems to me that the largest motor should be calculated twice. Once at 100% in fixed appliance and then separately in motor loads as largest motor at 125% again. Anyone?
Sir AC if added up should be 7680W
Wow, I cant believe I went a year and not ever noticed that!! Thank you for pointing that out. Its nice to see people are paying attention!! Guess it never occurred to me seeing it was irrelevant anyway!! Thanks for watching!! CM
@@craigmichaud-electricalins4602 It might not be that impt coz its only a writing error but for the sake of argument that you"re demonstrating calculations the numbers should add up. I enjoyed watching your video its very informative but for your future audience maybe 100,000 people you dont want to confuse them to subscribe on your channel
@@joaquimlloren6769 oh stop your whiny st Andrew's the third minus 1
Isn't it actually 7,704? 23.5A x 240V= 5,640W doesn't it? Or is my math off?
@@KenKaneki-xh7by yeah
17,2X120= 2064 why you get 2040?
your script didn't match the figures on the whiteboard haha sorry
Sorry my bad.
Recheck your math it should be 7,680
he's got the issue on the 17.2x120 that's why the misunderstanding