Series Theory
What does current do in Series?
Stays the same
It=I1=I2=I3...
What does voltage do in Parallel?
It stays the same.
Et=E1=E2=E3...
What is the maximum distance between receptacles in a dwelling living room?
12'
210.52 A
No point can be further than 6' from a recp. 6'+6'=12'
What code outlines the gfci requirements for a dwelling unit?
210.8 A
How is power calculated in a circuit?
It's additive.
Pt=P1+P2+P3...
What does Voltage do in series?
It's additive.
Et=E1+E2+E3...
What does current do in Parallel?
It's additive.
It=I1+I2+I3...
Does a recp in a Popeyes bathroom need GFCI protection at the Circuit Breaker?
No, the recp must be GFCI protected, but it doesn't mater where in the circuit prior to it.
210.8 B
What is the DC resistance of 450' of coated copper 250Kcmil?
.024075 Ohms
CH9 T8
How do you find resistance when a name plate has Watts and Volts?
E^2/P
Volts squared, divided by power
What is the formula for series resistance?
Rt=R1+R2+R3...
What is the formula for parallel resistance?
Rt=1/
(1/R1)+(1/R2)+(1/R3)...
What is the temperature rating of THHN/THWN when installed in EMT on the under side of a covered walkway?
The location would be damp and thus follows THWN out of 310.4
How many volt-amps are allocated per square foot in a house for general lighting/recp load?
3VA/sqft
220.41
What code covers the disconnecting means of Photovoltaic systems?
690.15
What is the resistance of 1 element, if a heating unit is rated for 13.5Kw @250v and had 4 equally rated elements connected in series?
1.157 ohms
What is the totals resistance of a parallel circuit with 4 equally rated elements that share the nameplate info off 2500w @ 250v?
6.25 ohms
What would the corrected ampacity of 3/0 awg copper THHN wire be, if installed with 6 other conductors and in an area that sees summer time temps of 118 F?
129.15
=225x.7x.82
How far from the inside edge of a permanently pool does the convenience recp need to be?
at least 6', not more than 20'
680.22 A (1)
what is the equivalent resistance of (3 lamps in parallel ) and 1 lamp connected in series with the previous?
all lamps are equally rated 75 w @ 130v
300.444 ohms
What is the circuit total current given the following?
all loads connected in series to a 120v branch cir
Load 1= 350w @ 125v
Load 2= 500w @ 115v
Load 3= 100w @ 130v
44.643,26.45,169=240.093 ohms total
.5a total
How many volts are applied to element 2?
All elements are connected in parallel to a 120/208v 3ph 4w system through a single pole breaker.
Load1= 3000w @ 120v
Load2= 600w @125v
Load3= 1750w @ 120v
120v
What code ref would outline the disconnecting means for a 11/2 hp garbage disposal?
422.31 B
What 1900 box would be required to hold, (3)12-2mc,(2) 12-3mc, and 2 switches; the box will be installed with a 2 gang p ring that has a volume of 8.8 cuin?
4x4x 2(1/8)
What duty rating does type SVEOO cord have?
Not hard usage
400.4