Electrical Basic Concepts - RSES NATE Prep

Electrical Basic Concepts - RSES NATE Prep. Volts, Amps, Ohms, ohms law, watts law, series and parallel circuits.

Read all the tech tips, take the quizzes

[misaelmorenoluna]

I just graduated from the HVAC program this month, and we learned all of this valuable info. I just started my adventure in the field of HVAC/R this week and I was mind-blown by how much business goes on a daily basis, it's like the pandemic never existed. So far I am glad I chose this career path and I am hopeful that a great experience is ahead of me!.

[resurgensix]

Brilliant. Really nails the core concepts. God bless you B!

[yrwyreazureAjuhtrea]

Nice mix of review and new information, thanks Bryan.

[mrgreen]

I could be wrong, but i think new techs know this more than a senior or older tech would.

[sukhbindersingh]

Hi
I am facing some problem with walk in freezer refrigerant is 404A when we start the unit it's working but after a 4 to 5 hour unit head pressure control valve bypassing refrigerant .we control condenser fan with out door thermostat set on 70F. Suction pressure is 35 psig and discharge pressure is 230psig . whenever unit bypass valve bypass refrigerant its never come in normal position even in a day time temp is over 85f .some time we shut of the unit and start again bypass valve making hamering noise and start working again for few hours .
Thanks
Sukhbinder Singh(San Diego California)

[oscarmosca]

hi, i have the impression at 19:42 that you didnt use reciprocals for the resistance when you were doing the parallel circuit. you used the series formula instead. the reciprocals formula is one divided by the sum of all the reciprocals. good video though. im in hvac school and im reviewing hvac electricity for a test next week.

[rickyl]

I really need help from here:
How fast does air with a velocity pressure of 0.20 in w.g. move through a round duct?

????
Please provide some formula please
I know Vp=V/4005 !!!!

But I need more information on this Nate question. I know the correct answer but how to how find the formula on this ?

Pease help

[coldfingersub]

Reminds me of seventh grade middle school in San Francisco back in the 70s when taking electronics class that had a full-blown electronics lab just like a college or university does today. Ask kids or college graduates the same questions today who graduate nowadays and they looked at you like a deer with the headlights in the eyes. Degradation of the public school education system.