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What is acceptable AC voltage range?
In the United States and Canada, national standards specify that the nominal voltage at the source should be 120 V and allow a range of 114 V to 126 V (RMS) (−5% to +5%).
Are voltage spikes common?
However some voltage spikes may be created by current sources. Voltage spikes may be longitudinal (common) mode or metallic (normal or differential) mode. Some equipment damage from surges and spikes can be prevented by use of surge protection equipment.
What would cause a voltage spike?
A voltage spike is a sudden increase in voltage that lasts for less than three nanoseconds. A sudden increase in voltage that lasts for three nanoseconds or more is called a voltage surge. Voltage spikes and surges can be caused by lightning, static electricity, magnetic fields, and internal changes in voltage use.
What are the effects of a voltage spike?
RTCA DO-160 – Section 17.0 – Voltage Spike. This test determines whether the equipment can withstand the effects of voltage spikes arriving at the equipment on its power leads, either ac or dc. The main adverse effects to be anticipated are: Permanent damage, component failure, insulation breakdown. Susceptibility degradation,…
How can I prevent damage from voltage spikes?
Some equipment damage from surges and spikes can be prevented by use of surge protection equipment. Each type of spike requires selective use of protective equipment. For example, a common mode voltage spike may not even be detected by a protector installed for normal mode transients.
What makes a voltage range acceptable for a system?
User systems shall be so designed and operated that with service voltages within Range A limits, most utilization voltages will be within the limits specified for this range. Utilization equipment shall be designed and rated to give fully satisfactory performance throughout this range.
What’s the acceptable voltage range for utilization equipment?
Acceptable Voltage Ranges. The difference between service and utilization voltage allows for voltage drop in facility wiring between the point of utility delivery and the utilization equipment. The National Electrical Code (NEC), recommends that voltage drop in branch circuits (sub panel to utilization equipment) be less than three percent.