Hey we have some exciting news! We are partnering up with MEP Guy to launch the most effective REVIT courses for MEP designers and engineers! Check out the Electrical course preview and sign up here: www.mepguy.com/electrical As a special bonus, we're offering a free download of an Electrical Clearance family that anyone can use to designate a "no fly" zone or clearance zone that must be maintained in front of electrical equipment. Drop it anywhere you need folks to keep clear of zappy things!
@gamalhassan2769 Жыл бұрын
Thanks
@hamidqaderi880311 ай бұрын
It was a great video, Thank you!👍
@willieyu4283 Жыл бұрын
Great video!
@marymoarab Жыл бұрын
It was very useful 👍 Thank you
@theelectricaldepartment
Жыл бұрын
Glad it was helpful!
@anjalikk58356 ай бұрын
How revision cloud comes with 2 arcs by default?Is there any way to make it as 1arc and thereby it seem to be symmetrical
@williamknox94 Жыл бұрын
How is you’re experience with automated wire sizing? I have a really good system built for sizing various conductors, but occasionally need to skew allowable voltage drop… I’ve built up a schedule as well for VD / OCPD sizing w/ conditional formatting to warn me about VD > 3% and breaker ratings being under 125% of true current. Would love to hear your thought and even more-so a video over this topic!!
@williamknox94
Жыл бұрын
Also, absolutely love your content, engineer-to-engineer 🎉
@theelectricaldepartment
Жыл бұрын
HA I'm glad I wasn't the only one trying to automate this. it seems logical right? At this load, 1phase = this breaker, 3phase = this breaker. but nooooo, Mechanical goes and moves their equipment to the roof, suddenly you have to account for ambient air temps in the 110F and derate the feeder. Then you find out it's ordered in 208V instead of 480V so suddenly more voltage drop comes in. Then they go and move the damn thing ACROSS the roof and you're practically forced to add a transformer at the far end so you don't need a 4/0 conductor running across the roof. I'm not bitter at this at all 🤨 Jk it wasn't really that bad, but my point is, automation failed me several times on the project. I always size each piece of equipment or panel run case by case and check all the factors in terms of temp, distance, method of installation and whatnot. the only thing I tend to use the spreadsheet for are 20-30A loads at 120-208V. those tend to be more predictable and can be sized automatically. Some rules I keep are stay under the number of feet in voltage, account for 20-25 feet of vertical runs for each feeder, and assume anything running on roof or even just below steel requires derating due to temps. you're right, this could easily be a couple videos haha!
@theelectricaldepartment
Жыл бұрын
Oh I like that you picked up on VD affecting motor's FLA. Motors will pull a set amount of power, if voltage gets low, they make it up in amperage and trip breakers or burn out starters/vfds. I know this is overkill but I tend to size conductors of longer runs at 140% FLA of the equipment (basically always consider it as continuous duty) and either use Max overcurrent protection listed by the manufacturer or size the breaker to protect the feeder. sometimes it will end up with like a 60A feeder protected by a 50A breaker and all runs well.
Пікірлер: 12
Hey we have some exciting news! We are partnering up with MEP Guy to launch the most effective REVIT courses for MEP designers and engineers! Check out the Electrical course preview and sign up here: www.mepguy.com/electrical As a special bonus, we're offering a free download of an Electrical Clearance family that anyone can use to designate a "no fly" zone or clearance zone that must be maintained in front of electrical equipment. Drop it anywhere you need folks to keep clear of zappy things!
Thanks
It was a great video, Thank you!👍
Great video!
It was very useful 👍 Thank you
@theelectricaldepartment
Жыл бұрын
Glad it was helpful!
How revision cloud comes with 2 arcs by default?Is there any way to make it as 1arc and thereby it seem to be symmetrical
How is you’re experience with automated wire sizing? I have a really good system built for sizing various conductors, but occasionally need to skew allowable voltage drop… I’ve built up a schedule as well for VD / OCPD sizing w/ conditional formatting to warn me about VD > 3% and breaker ratings being under 125% of true current. Would love to hear your thought and even more-so a video over this topic!!
@williamknox94
Жыл бұрын
Also, absolutely love your content, engineer-to-engineer 🎉
@theelectricaldepartment
Жыл бұрын
HA I'm glad I wasn't the only one trying to automate this. it seems logical right? At this load, 1phase = this breaker, 3phase = this breaker. but nooooo, Mechanical goes and moves their equipment to the roof, suddenly you have to account for ambient air temps in the 110F and derate the feeder. Then you find out it's ordered in 208V instead of 480V so suddenly more voltage drop comes in. Then they go and move the damn thing ACROSS the roof and you're practically forced to add a transformer at the far end so you don't need a 4/0 conductor running across the roof. I'm not bitter at this at all 🤨 Jk it wasn't really that bad, but my point is, automation failed me several times on the project. I always size each piece of equipment or panel run case by case and check all the factors in terms of temp, distance, method of installation and whatnot. the only thing I tend to use the spreadsheet for are 20-30A loads at 120-208V. those tend to be more predictable and can be sized automatically. Some rules I keep are stay under the number of feet in voltage, account for 20-25 feet of vertical runs for each feeder, and assume anything running on roof or even just below steel requires derating due to temps. you're right, this could easily be a couple videos haha!
@theelectricaldepartment
Жыл бұрын
Oh I like that you picked up on VD affecting motor's FLA. Motors will pull a set amount of power, if voltage gets low, they make it up in amperage and trip breakers or burn out starters/vfds. I know this is overkill but I tend to size conductors of longer runs at 140% FLA of the equipment (basically always consider it as continuous duty) and either use Max overcurrent protection listed by the manufacturer or size the breaker to protect the feeder. sometimes it will end up with like a 60A feeder protected by a 50A breaker and all runs well.
Th