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For a parallel feed to a 1200 Amp service 3 phase what size is the grounding electrode to main service with 3 600 mcm parallel runs?
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∙ 12y ago
500 mcm
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∙ 12y ago
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What size copper grounding electrode conductor is required for a service that has three sets of 600 kc mil copper conductors per phase?
The grounding conductor of a service distribution is sized by the ampacity of the service. By just stating the wire size, this does not give this information, as many variables enter into what wires are used depending on length, ambient temperature and insulation factor to name a few.
Can a loose neutral be check at meter?
it depends on where the neutral is lost if its loose on the street side of the meter or grounding electrode conductor one leg will have a higher voltage than the other but the grounding electrode conductor may be large enough to act as the neutral and remove all the phase imbalance this will show current in the ground on the load side everything will look normal if you have 4 identical lights 2 on each leg you will not detect any difference if you turn off one lamp the lamp on that leg will supply the current to the two on the other letting the single lamp see 160 v 50% brighter and the 2 in parallel on the other leg 80v 50% dimmer triplex wire the bare wire is the neutral and the messenger so if a furniture van pulls to the door an snags the cable. the neutral will break leaving about 6' of slack in the hots.( drip loops at the weather head) and they stay connected the grounding electrode conductor is likely connected to the water line and every house on the street is too so the voltage across the break will be less than 1v unless your phase loads are all on on leg which will mean on the order of 1V delta V= i^2*r (#2Al neutral)- i^2*r (#4cu grounding electrode conductor)
Can a home have both 110 volt and 220 volt power?
In the U.S.A., from the utility's transformer, all homes are provided with two 120 volt, alternating phases. (A phase black, B phase red) and a neutral (white) - called a single phase 3-wire system.The neutral (white wire) allows for balance and return of the current, from and for each phase.If one removes the neutral, this results in 240 volts, supplied by both the A phase and B phase.For example: a plug circuit requires 120 volts. A black (A phase) and a neutral or a red (B phase) and a neutral.An oven requires 240 volts. Both the A and B phases are supplied to the oven.All electrical devices are required to have a grounding (green) wire, bonds the entire house to a grounding electrode.
What would make the ground wire burn into where it connects to the weather head on a house?
The ground wire is not connected to the weather head. The phase wires and neutral wire are connected to the weather head. The ground will be connected between the grounding electrode system and the service equipment. That being said, any current carrying wire could burn into something by causing excessive heat. This can be caused most easily by a loose connection at the point of the burn.
what is the cheapest electric supply cost single phase or 3 phase?
The cheapest service to construct is a single phase service. A three phase service requires more equipment and materials to complete a service.
How many current carrying conductors can share the same grounding conductor in a single phase panel?
5
Do you need a grounding rod at a subpanel on a detached building?
Yes. The panel must be grounded with its own grounding rod. The ground will not be provided with the feeders to the panel, these will only contain your phase wires and neutral. Also make sure that any subpanel installed does not have the neutral bonded to ground. This should only be done at the main panel where the electrical utility service is connected.
How many wires come in from the weather head?
If single phase - 2 wire service > two wires If single phase - 3 wire service > three wires If three phase - 3 wire service > three wires If three phase - 4 wire service > four wires US residential service is usually single phase 3 wire service: Two hots and neutral.
Is 340V a three phase service?
600v is a three phase service, where 347v is the L-N voltage (if grounded).
Can a 3-phase DYN 1 transfomer be connected in parallel with a DYN11?
No
When connecting two alternators in parallel do the two voltages have to be in phase or directly out of phase?
They must be precisely in phase. If connected out of phase current would flow uncontrollably between the two alternators as a short circuit.
What are the main condition to run two 240v AC UPS on parallel.?
They MUST be specially designed to share a common phase signal, so the outputs are in-phase. Yo cannot just parallel any two UPS's.
