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What voltage should you read between neutral and ground?
Hot-neutral is the load voltage. Voltage should read about 120 V (typically 115 V to 125 V). You measure exactly 118.5 V. Neutral ground is a voltage drop (also called IR drop) caused by load current flowing through the impedance of the white wire.
What is the voltage between phase and ground?
For the US, this is typically 120V. For single phase voltage, the voltage is expressed as a Line to Neutral voltage between two power conductors (plus a safety ground). The neutral conductor is normally at ground potential while the Line conductor is a sinusoidal AC voltage with an RMS value of 120Vac.
How is grounding connected to a stepdown transformer?
In addition to the main solidly grounded system that supplies the facility, two different solidly grounded systems are established at the secondary of each stepdown transformer. A neutral of each transformer is bonded to the transformer enclosure and connected to the grounding electrode of the system.
What makes a step down transformer autotransformer?
Most step-down transformers (certainly all inexpensive ones) are actually autotransformers, meaning they have only a single winding with a center tap rather than two separate, electrically isolated windings. Schematic of step-down transformer, one plug orientation
How is the output of a transformer connected to the ground?
The output of your transformer is floating i.e. it is not galvanically connected to ground. However, it will be capacitively connected to the primary winding and, (it sounds like) the primary and secondary voltages are conspiring to produce a high impedance voltage of 240 V between secondary neutral and earth.
Why is the neutral symbol on a transformer called that?
The neutral is so called because the link between it and ground “neutralises” the voltage on that line. The central symbol is a chassis connection – usually a crimped ring terminal bolted onto the chassis somewhere. This is done to keep the chassis at ground potential. The third symbol is the signal – audio in this case – ground.