What is the purpose of the high leg on a duct?
The high leg is simply part of the 3 phase network and useable in any 3 phase or single phase 240 volt equipment. The high leg is not used ever for 120v loads. yes and your also not suppost to make love to 480 v bus duct.
What is high leg delta?
What is High Leg Delta? High Leg Delta (also known as Power Leg or Wild Leg) is a three phase, four wire power distribution system used in commercial buildings in North America especially in rural and older installations. The main advantages of the high leg delta system is that there are three types of available voltage i.e. 120V, 208V and 240V.
What is a high leg transformer?
The high leg, or wild leg, or snake leg, or bastard leg, is found when a service supplies a building with 240 V 3 phase. Because at least some of the lights and equipment will need 120 V, one of the transformers is sized larger and center tapped.
What is a corner grounded high leg system with neutral?
A high leg system with a neutral is not "corner grounded" A winding is CENTER TAPPED (XO) for a neutral point and connected to ground. A corner ground is used on a strait 3 phase, 3 wire Delta system, that has no neutral. One of the phases, normally A phase, is connected to a grounding electrode.
What is a high leg?
Can you use wild leg for 120V?
Can you eat yellow snow?
Can 208V work on single pole breaker?
Is corner grounded a decieving pic?
120/240 Volt 3-Phase Delta High Leg | Electrician Talk
Ok I have a question about a high leg delta transformer. I know that phases A and C to neutral you get 120 and that phase B to neutral you get 208. I also know that between any two phases you get 240. My question is why don't you get 328 volts from phase B to either phase A or C? I believe it...
480v high leg(?) delta | Electrician Talk
Sounds like an Open Delta. You are probably measuring 240V line to ground, which is erroneous. The two transformers are making up a 480V delta service with an open jaw.
High Leg Delta - Wiring 240V, 208V & 120V, 1 & 3-Phase Panel
How to Wire High Leg Delta Main Panel for 120V, 208V & 240V, Single Phase & Three Phase Circuits? Wiring of 240V, 208V & 120V, 1 & 3-Phase High Leg Delta Breaker Box?
What is a high leg?
The high leg is simply part of the 3 phase network and useable in any 3 phase or single phase 240 volt equipment.
Can you use wild leg for 120V?
yes and your also not suppost to make love to 480 v bus duct. Is it just me or is anyone else sick of people posting replies that JUST STATE THE OBVIOUS. of coarse you dont use the wild leg for 120v loads BECAUSE THE WILD DOES NOT PRODUCE 120 V TO NEAUTRAL
How many phase is a 120V transformer?
Power is transmitted over long distances at high voltage. In order to supply domestic and residential applications, it needs to be stepped down to 120V or 230V single phase. This conversion happens inside a transformer. If the secondary of this transformer is delta then, the centre of any one of the phases is centre-tapped and grounded. This allows 120V single phase for single-phase loads and 240V three-phase for three-phase loads, both served by a single transformer.
What is a high leg delta connection?
A high leg delta connection is a configuration in which one of the windings in a delta connected secondary of a transformer is centre-tapped and grounded. It is also known as red leg connection or wild leg connection or orange leg connection. By doing so, we are creating a split phase supply as well as a three-phase delta connected supply.
What is a substitute for high leg delta?
A substitute for high leg delta is WYE or star-connected secondary with the centre point grounded. This connection can also provide three-phase as well as single-phase connections.
How to supply high leg delta?
High-leg delta service is supplied in one of two ways. One is by a 3-phase transformer (or three single-phase transformers), having four wires coming out of the secondary, the three phases , plus a neutral connected as a center-tap on one of the windings. Another method (the open delta configuration) requires two transformers. One transformer is connected to one phase of the overhead primary distribution circuit to provide the 'lighting' side of the circuit (this will be the larger of the two transformers), and a second transformer is connected to another phase on the circuit and its secondary is connected to one side of the 'lighting' transformer secondary, and the other side of this transformer is brought out as the 'high leg'. The voltages between the three phases are the same in magnitude, however the voltage magnitudes between a particular phase and the neutral vary. The phase-to-neutral voltage of two of the phases will be half of the phase-to-phase voltage. The remaining phase-to-neutral voltage will be √ 3 /2 the phase-to-phase voltage. So if A-B, B-C and C-A are all 240 volts, then A-N and C-N will both be 120 volts, but B-N will be 208 volts.
What is phase B?
One of the phase-to-neutral voltage (usually phase "B") is higher than the other two. The hazard of this is that if single phase loads are connected to the high leg (with the connecting person unaware that that leg is higher voltage), excess voltage is supplied to that load. This can easily cause failure of the load.
Why is the high leg of a transformer called orange leg?
It is called "orange leg" because the wire is color-coded orange. By convention, the high leg is usually set in the center (B phase) lug in the involved panel, regardless of the L1-L2-L3 designation at the transformer.
What is a high leg delta?
High-leg delta (also known as wild-leg, stinger leg, bastard leg, high-leg, orange-leg, red-leg, dog-leg delta) is a type of electrical service connection for three-phase electric power installations. It is used when both single and three-phase power is desired to be supplied from a three phase transformer (or transformer bank).
Is a high leg a split system?
If the "high leg" is not used, the system acts like a split single-phase system, which is a common supply configuration in the United States. Both three-phase and single split-phase power can be supplied from a single transformer bank. Where the three-phase load is small relative to the total load, two individual transformers may be used instead ...
How to Wire High Leg Delta, 208V, 1-Phase Circuits & Breakers?
The following tutorial shows how to wire a 208V single phase breaker fed up by a high leg delta busbar for residential and commercial uses.
How to Wire 240V, 1-Phase Circuits & Breakers?
To do so, simply connect the appliance (water heater in our case) via two poles breaker connected to two hot wires (such as Hot 1 , Hot2 and Hot 3) and ground wire. Connect the additional neutral wire if needed.
How to connect 120V to a standard outlet?
To connect a 120V single phase standard outlet, just install a single pole MCB circuit breaker and connect any hot (hot 1 or hot 3, not high leg delta as hot 3) to the breaker. Connect the hot wire from the breaker to the hot (L) terminal of the outlet. Similarly, connect both neutral and ground wires to the receptacle “N” and “G” terminals.
How many transformers are needed for high leg delta?
For high Leg delta supply, the electric power supply company installs three transformers to provide 120V, 208V and 240V (1 & 3 Phase) supply voltage levels based on the end user requirement. The primary side of these three step-down transformers are connected to the 4.5k-7.2kV supply. The transformers then reduce the level of voltage to the desired 240V, 208V and 120V applicable to the commercial buildings and industrial installations.
How many wires are needed for a high leg delta panel?
In a high leg delta panel, we need four or five wires (three as hot) for three phase 240V circuits. As shown in the following fig, we have two appliances viz three phase motor and L21-30R or L21-20R outlet. You can see that we have connected all the three hot wires including the high leg delta. Additionally, we have connected neutral and gerund wires as well. You may do the same with other devices having the same design for connection such as surge protectors found in main disconnect switches, main distribution panel, sub panels, load centers and equipment locations.
What is a 3 pole outlet?
In 3-Poles, 240-250V, 3-Wires, Non-grounding, 3-Phase outlets such as 11-15R, 11-20R, 11-30R, 11-50R, L11-15R, L11-20R, L11-30R etc. You have only connect all three Hot wires i.e. there is no need to connect the ground and neutral wires.
What color wires are used in a high leg delta?
The recommended colors for hot wires in a high leg delta three phase system are Black, Orange and blue for three hot wires where High Leg Delta must be indicated with Orange color. In other words, High Leg delta must be identical among other hot wires.
What is a high leg?
The high leg is simply part of the 3 phase network and useable in any 3 phase or single phase 240 volt equipment.
Can you use wild leg for 120V?
yes and your also not suppost to make love to 480 v bus duct. Is it just me or is anyone else sick of people posting replies that JUST STATE THE OBVIOUS. of coarse you dont use the wild leg for 120v loads BECAUSE THE WILD DOES NOT PRODUCE 120 V TO NEAUTRAL
Can you eat yellow snow?
dont eat the yellow snow, look both ways before crossing, make sure you tighten your wire nuts,pay your taxes, wait a half hour to swim after eating, dont shoot at police officers, dont put deisel in a gasoline engine, dont kill and steal because its illegal, dont use bare conductors as hots.
Can 208V work on single pole breaker?
As far as I know, the high leg itself isn't used to power loads normally. I guess that any single phase 208 V equipment would work on a single pole breaker, but that is a novel and non-standard application.
Is corner grounded a decieving pic?
That's not corner grounded. It is a decieving pic
