Just want to say thanks for these videos. I'm an apprentice electrician and this helped me better understand the high leg layout clearly which I've already ran into a few times.
Awesome session. In this video 208 Vac is considered - in this system - as an unwanted result. I know that most appliances require 120 Vac or 240 Vac. But the 208 Y / 120 system implies that devices exists that are designed to be powered by 208 Vac, right?
Absolutely. 208 V is definitely a commonly utilized voltage for three phase wye, but you are correct it is unwanted in this situation. Imagine plugging a 120v device into an outlet that has 208v across it!
The C phase is now required to be orange. I believe it used to be the b phase was indicated high leg by an orange conductor. I do not have a copy of the NEC, so I don't know when that change was made.
Good vid 1 question so i have watched other vids which explain the high leg and watching your vid seems to make it more clear to me about how this happens lets say but the other vids i had watched say the high leg is on B phase not A please explain
This exactly what I am planning, I was told by the electric company, the balancing would be a nightmare, the main disconnect would have to be 3 phase... if the 3ph is 100 amps panel, and the split phase is 200 amp panel, there is something about 120v should be no more than 5-10% of the load on the delta connection, there will be phasing issues as the split phase are supposed to be 180 degrees apart. Tapping the 3 phase the phasing will be 120 degrees apart... Is this an issue.. They want to make 2 drops.. am I being sold a bill of goods by the Electric company...
Just want to say thanks for these videos. I'm an apprentice electrician and this helped me better understand the high leg layout clearly which I've already ran into a few times.
I'm happy they were helpful for you!
Awesome video Chris
Canada: keeping our electrical panels polite.
very informative tutorial! thank you so much...
Thank you for watching!
@@schulerruler you can only get a high leg in a Delta system and only if that system has a neutral, correct
Correct. If there is a centre tapped phase, there will be the possibility of a high leg to neutral voltage of 208V present.
Awesome session. In this video 208 Vac is considered - in this system - as an unwanted result. I know that most appliances require 120 Vac or 240 Vac. But the 208 Y / 120 system implies that devices exists that are designed to be powered by 208 Vac, right?
Absolutely. 208 V is definitely a commonly utilized voltage for three phase wye, but you are correct it is unwanted in this situation. Imagine plugging a 120v device into an outlet that has 208v across it!
What conductor is required to be labeled orange ? (USA, NEC)
The C phase is now required to be orange. I believe it used to be the b phase was indicated high leg by an orange conductor.
I do not have a copy of the NEC, so I don't know when that change was made.
Good vid 1 question so i have watched other vids which explain the high leg and watching your vid seems to make it more clear to me about how this happens lets say but the other vids i had watched say the high leg is on B phase not A please explain
More than likely those are US videos. The Canadian electrical code requires A leg be high leg though.
This exactly what I am planning, I was told by the electric company, the balancing would be a nightmare, the main disconnect would have to be 3 phase... if the 3ph is 100 amps panel, and the split phase is 200 amp panel, there is something about 120v should be no more than 5-10% of the load on the delta connection, there will be phasing issues as the split phase are supposed to be 180 degrees apart. Tapping the 3 phase the phasing will be 120 degrees apart... Is this an issue.. They want to make 2 drops.. am I being sold a bill of goods by the Electric company...