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Is the white dotted line on a power supply positive or negative?
Wiki User
∙ 12y ago
Household power supplies are Alternating Current (AC), not direct current (DC) and AC never has a "positive" and a "negative" wire. AC has at least one "hot" wire, which supplies power to the appliance at a voltage which alternates between positive and negative at 60 cycles per second. If there is only one "hot" wire there must always be a "neutral" wire to complete the circuit and carry the return flow of current from the appliance back to the power station.
Using the standard #16 guage extension cord as the assumed supply cord, on one side of the cord you will find a raised ridge: that could be the neutral (white) side. If that is the neutral, then the smooth side would have to be the hot side. Or vice versa.
Note: you should never assume which wire is the hot and which wire is the neutral because someone may have hooked the cord up wrongly or the cord may fed by an unpolarized plug which can be inserted into an outlet either way round.
If you really need to know this information for a particular cord on an appliance then the only safe advice anyone should give you is: you must use a voltmeter or other testing device in a safe manner to be sure of which wire is which.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
If you do this work yourself, always turn off the power
at the breaker box/fuse panel BEFORE you attempt to do any work AND
always use an electrician's test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoFrom all the research I can find, the wire with the white dotted line is the POSITIVE terminal; I have yet to find any sites which state otherwise.
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Can be the power factor become negative reading?
Yes, power factor can be negative. That is the case of a generator. Power factor is the cosine of the phase angle between voltage and current, and the cosine can be positive or negative.AnswerNo. Power factor can be 'leading' or 'lagging', but it cannot be 'negative' or 'positive'.
When switch is off of power supply output shown on the multimeter is negative voltage from power supply?
Yes.
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what is negative of the nuclear power plant
On a power supply is red a positive terminal?
On a car red is usually positive. But positive can also be black in some applications such as home wiring.
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What do you Mean dual tracking power supply?
It's a power supply with a positive and negative voltage, where one of the voltages tracks the other. For example: the negative voltage tracks the positive. If you regulate the positive to 15v, the negative is going to be -15v. This allows very precise symmetric power.
How does current flow along a conductor?
Conventional Current states that current moves from the positive terminal of a power supply to the negative terminal.Electron Flow states that electrons move from the negative terminal of a power supply to the positive terminal.
What thing have a negative and positive sign?
Integers, batteries, dc power supply, ions........
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What is negative seven in Parentheses to the second power?
positive 49 Because a negative times a negative is a positive. -7*-7=49. positive * positive = positive negative * negative= positive positive * negative = Negative
Can electricity deliver power when the phase is negative against the neutral?
Provided the load has a power factor of 1 power is transferred when the live is both positive and negative. The power pulsates at double the supply frequency in a single-phase system
What the negative and positive sign shows for power factor?
Applying a negative or positive sign to power factor is an obsolete method of describing whether it is 'leading' or 'lagging'. We no longer do this. These days, a 'leading power factor' indicates that the load is capacitive and the load current is leading the supply voltage, and a 'lagging power factor' indicates that the load is inductive, and the load current is lagging the supply voltage. Having said that, a 'negative' power factor is also the mathematical consequence of 'negative power' -i.e. the direction of power when it is fed from the load back to the supply (e.g. when the grid feeds energy into a generator, causing it to 'motor'). In this case, the power factor isn't really negative, but simply appears to be so.
A negative number raised to an even power will be positive or negative?
Positive
What is a negative to negative a power?
negative multiplied by negative would be positive
Why do telecommunication systems use negative voltage?
negative polarity is achieved by grounding the positive terminal of power supply system and the battery bank. This is done to prevent electolysis depositions.
Can be the power factor become negative reading?
Yes, power factor can be negative. That is the case of a generator. Power factor is the cosine of the phase angle between voltage and current, and the cosine can be positive or negative.AnswerNo. Power factor can be 'leading' or 'lagging', but it cannot be 'negative' or 'positive'.
How do you wire -48v dc power and ground to earth?
always think of any supply system so : RED = MOST POSITIVE BLACK = MOST NEGATIVE in a telecom system the -48V supply is refferenced to ground and earth, so the supply wire is NEGATIVE, this means a DC supply most positive signal the RED wire, go to EARTH = ZERO, the BLACK wire is the MOST negative, so in this case it is -48V
