It's AC. There is no polarity per se. The AC waveforms have equal magnitude are out of phase
Dedicated Circuits - Subpanel importance?
My system is no more. Sold everything. Starting from scratch. Thanks to you and seven months of experience I am doing the following, which is taking care of the number one component, the room:
- Treating. The full GIK order in October is starting to arrive.
- Running one or more dedicated circuits.
I am addressing #2 in this post. There are extensive discussions here and one can spend hours if not days trying to wring-out the critical details needed for a DIY solution. I have spent hours and there a few things I need to confirm before I proceed because I was unable to find definitive answers.
I am doing this myself. I do not want or need lectures on only having a licensed electrician do this work. I have been doing my own electrical work for many years and am very comfortable doing so.
- Does a subpanel help? Is it required? Subpanels are typically supplied from a breaker off of the main panel's bus, so I'm guessing there is no advantage in terms of SQ? Perhaps if I can independently ground the subpanel it might make a difference?
- Opening up my walls is not an option, so I need to use conduit. This may restrict the number of lines if the wire should not share the same conduit? If I am restricted to Romex 8 or 10,2 versus metal-clad, is it okay for two runs to occupy the same conduit?
- How much better is metal-clad? Is it required vs Romex? Will metal conduit accomplish the same result with Romex?
Answers to these questions will complete my plans and I will go forward at speed. Hopefully this discussion helps others as well even if it's to know what to have their electrician setup for them.
Thank you!
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- 68 posts total
Guys, When the full 240V secondary winding is used to feed a 240V load the winding works like any other single phase transformer winding. Things change when 120V loads are connected to L1, leg, and the neutral, and L2, leg, and the neutral. This is where the polarity of each side of the secondary split phase winding gets interesting. If L1 to neutral and L2 to neutral loads are exactly the same amperage, zero amps will return on the neutral conductor to the transformer neutral center tap. Example 10 amp load connected to L1 and neutral and 10 amp load on L2 and neutral. Zero amps will return on the neutral conductor to the center tap neutral on the transformer. The two 120V loads will be in series with one another and fed by 240V. If a10A load is connected to L1 and neutral and 5A load connected to L2 and neutral, the unbalanced load of 5 amps will return on the neutral conductor. On a single phase dual winding secondary it is important to observe the polarity of the windings when connecting them together. How it works. https://www.allaboutcircuits.com/textbook/alternating-current/chpt-10/single-phase-power-systems/ . |
I had a long reply, but after reading the thread again I deleted it.... Some of you cats are too far out for me to even address let alone have to argue a point. Anyone claiming to know it all about electricity is the most dangerous person at your home, job site, or utility. Work Safely, Grizz Retried IBEW Superintendent, Foreman, Journeyman wireman, Coal Fired PowerStation Electrician, C&I, and operations tech, and lastly Contractor.
LET'S TALK ABOUT SOUND and SOUND REPRODUCTION EQUIPMENT
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All I have to say is I made a boatload of money in the electrical industry considering all of the big brains telling me I'm wrong. I know NEC sucks and changes almost what seems daily. To all electrical working brothers and sisters please look twice work safe and go home to your families every single night. With Respect, C.A. Braden Grizz (preferred handle) |
- 68 posts total