Sizing Fixed Appliances, Load Calculations
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- čas přidán 25. 08. 2024
- In this video we discuss how to find the Fixed appliances.
Art. 220.53 Simple states that 4 or more fixed appliances must be calculated at 75%.
To break it down it tells us that if we have up to 3 appliances we calculate them at 100%.
If you only have a Horsepower rating then you must use the FLC from Art. 430.248.
By the way I just learned how to do this watching your video. Thank you for breaking it down... so many instructors go through this so fast to us new comers and it’s intimidating but I can honestly say since I found your channel I feel confident. You really care. Thank you
Wow, the way you break things down is impressive. I'm happy I found your channel.
Great teacher thanks so much for
Ur dedication 👍
Watching your videos is parering me to take my California Journeyman test within a couple of weeks. I find these videos very informative and great study guides. Thank you, Craig ( Electrical Instructor) love from Los Angeles
Good Luck. I am glad you enjoy them!! CM
Hey man please keep this up. This stuff is worth more then gold. I'm currently going to Dorsey for their electrical technician so I can know why I'm doing my job once I get out into the field( apprenticeship first). And I have a 4.0 but still study my homework after it's done, and I have gained a lot of knowledge through your videos, and just want to say thank you for helping with my homework but taking the time to do this to help people like me! Shout out to you brother and keep grinding. I'm going to school tomorrow and making the class subscribe 🙌🏽🙌🏽
Wow, Thank you so much for your kind words. I created this channel to help my students when they need a refresher. I cant believe how many people enjoy my video's. Thank you for your support. In the next few weeks I will be filming more videos. I will be getting them put out as soon as I can. Thanks for subscribing its totally appreciated!! CM
You should get a medal for these videos.
Great explanation. I look forward to watching more videos.
Hey Craig getting another video under my belt shout out from naptown
The video skips out on the disposal part right before he adds them up at (3min and 41 seconds into the video) that is NEC Table 430.248 where 1/3hp and 115 volts meet at 7.2, so you multiply 7.2 x 115 volts and it gives you his 828 number.
Thank you Craig your teaching is amazing! Houston, Texas 🤟🏾
Thankful that you take the time to teach.
Thanks man the teacher ran through this part and didnt make since. Now I know how to do this.
Excellent work, thanks for your advice.
Great video Mr. M, thanks.
Thank you!! I am glad this helped you!! CM
Craig, I have missed something important here. The "math" is very simple and perfectly clear. And you perfectly communicated that having 3 or less demands you "calculate" the total (watts, or volt X Amp as you said). If you add a 4th or more load then you multiply the "total" watts by 75% because the "assumption" is that not all the loads will be on at the same time. I "got" all that. What I don't understand is what is this entire exercise about? Are we sizing circuit breakers or wires, why are we doing this? What do you mean by the title "sizing fixed appliances" sized for what?
That is a fair question!! This is a part of a service calculation for a single family dwelling. I broke it down step by step to help my students!! I am sorry it confused you. I was still learning the youtude process at that time. Thanks for watching! CM
Yes this is just one of many steps in sizing a house
Great videos but it will good if you did not stand in front of the board covering up the calculations for most of the time.
Thank you so much for breaking it down
Great job!
Thank you so much!
Very informative. But I'd like to point out that VA (apparent power) and W (real power) are only equal when the load is purely resistive...which is the case with a water heater
Yes, unity pf if load is purely resistive like water heater, so VA=W/pf , VA=W/1, VA=W
Is a pool pump a fixed appliance load? I’m struggling with figuring out if I’m supposed to add this in or not.
Hi, thanks for the videos.. very informative.. what about ceiling fans? Are they included in the calculation?
I like your videos. can you pls make a video with "Mecellaneous motor loads" found in most load cals here in las vegas . Thank you.
Hi Craig,thank you very much for your great help, very good and easy explanation,how did you get the va from the largest motor,1526va?
Thank you for this!
What about the Refrigerator and Gas Stove?
Are they considered small appliances and should be added to the calculations???
Very helpful
Many thanks for this great informative video. What if all the appliances working at the same time continuously; what are the possible consequences of that?
Helping video dude thanks
Glad it helped. Thank you for watching. CM
Thank you so much man
How can you add a Pool load to the service load calc?
Thanks for vids Michael. why did U add back 3000va for GLL
Another great video. If you had say a hydro massage tub with a motor, would you add that in also. Thanks
Yes you would add that in your fixed appliances and if it was the largest it could be used as largest motor. Thanks for the question. CM
Thank you for the informative video! Great job teach! What about a hot tub and an electric car charger? Are those fixed appliances? Where do they fit into the equation?
thanks man. helped me a lot
How do you determine if its fix appliances or other ?
👏👏👏
In my corner of the U.S., we add up the lighting, + the 2 small appliance circuits, + each of large appliances on dedicated circuits.
We then keep 10,000 watts at 100%
And everything over 10,000 watts gets figured at 40%
The total figured at 40% + the 10,000 get divided by 240 (volts) to give the total amps of all those items.
From there we add the heating / cooling equipment using only amps to get the total amps required for the main panel.
Why is this different from the method you use? Why is it OK in my city and county?
It sounds like you are going from the plate on each appliance? Is it ok to just measure all the loads instead? And each of these shares a particular circuit?
Yes when sizing the service demand you must use the nameplate info. This is not used for sizing a circuit. This is where people make the mistake about this video! This is one of 5 videos on how to size an electric service for a dwelling. I hope this helps. CM
Thank you. I'm trying to figure out if I can add a 50A EV charging circuit.
So you would have to have the appliance name play ratings for this step ? There's no code reference to what to go off like the general lighting load ?
Would you group an Electric Tankless Water Heater in lieu of Electric Water Heater with Fixed Appliances?
What is considered a fixed appliance? Refrigerator, plug-in microwave, clothes washer, heater (gas) blower?
These are either permanently installed or fastened such as Wall Ovens, Dishwashers, Garbage Disposal or Compactors, Electric Ranges, Electric Water Heater, Microwaves above the stove (not on counter), etc. If it requires tools to remove and replace, then it is a fixed appliance.
Thanks
What if you are given the max rated power instead of the nominal draw? Is there a good rule of thumb for sizing the breaker? Should power factor also be considered?
Thanks Craig. How do i find your videos in order?
You can check out my playlists or just go to videos and start at the bottom. I normal make playlists for things grouped together!! Thanks for watching. CM
Can I get some worksheets for practice? With the step by step line instructions?
De Andre Johnson they have some online you could use just look up” load calculation form”
How to calculate neutrals on less then 4 appliance
Why are you using 115v for the disposal? Why wouldn’t you just use 120v? Would that make a difference in a multiple choice answer question?
How do you do one for general outlets?
15kw steam generator is deemed a fixed appliances or large motor? To including in my load calculation thanks
No because it is not something you use on an everyday basis. CM
Geyser wattage is 1500-2000 w ,how u write 5000w water heater . Is it total geyser load in 2000sqft flat???
Is there anyway u can do an example on voltage drop?
That is a video I plan on doing in the future. Thanks. CM
How u got 828 va for disposal rating 1/3 hp ,115 v , 1hp =746 w so 746/3 = ????
That is the FLC according the NEC. If you check out my WOLF chart video I explain it a little more. CM
what the difference between small appliances like 2*1500VA and this appliances thank you ?
This is referred to as the kitchen countertop outlets!! ie coffeemaker, electric can opener and things like that. All possibilities there needs to be a minimum of two circuits per NEC. Great question!! CM
So, these don’t get added into the general lighting load. because they get included in the small branch circuits? So do they just get added into the Small Branch Circuits or am I wrong and they are there own separate thing that gets added separately after Line9 Is done?
How do I sign up for your web site. Jeff Snyder😮
Look for new video