- Maximum voltage for mac air 2010 pro#
- Maximum voltage for mac air 2010 code#
- Maximum voltage for mac air 2010 plus#
The science we learned during our experiment included a fuller understanding of the scientific method, data collection methods, and data analysis through graphs. Our results show that, while decreasing the screen brightness of a laptop may decrease the power output of the computer, the decrease is slight and inconsistent. Another possible source of error is equipment failure (as observed in Tori’s data but to a lesser, less noticeable degree). This inconsistency may be due to several possible sources of error, including the running of background programs that we were unaware of, which could create a second variable affecting the recorded power values.
Maximum voltage for mac air 2010 pro#
This was calculated by subtracting the wattage consumption at 25% brightness from the wattage consumption at 100% brightness, and dividing that number by the max wattage consumption.Įxample Calculation for MacBook Pro (mid-2012, 15 inch w/ Retina Display):ġ8.5W-11.2W = 7.3W/18.5W= 39% decrease in power usage.Īll the calculations were averaged together to receive a value of 26%. In our data, we calculated that increasing brightness from 25%-100% increased wattage consumption by an average of 26%, but there were great deviations within this percentage. However, while we hypothesized that changing the brightness would increase power consumption by a consistent ratio, we found no such consistency. The urgency for such action will depend upon many factors, such as the location and nature of the load or circuits involved, and the magnitude and duration of the deviation beyond Range B limits.After careful examination of our data, it can be concluded that increasing screen brightness does increase the power consumption of a laptop.
When voltages occur outside the limits of Range B, prompt, corrective action shall be taken. Utilization equipment may not operate satisfactorily under these conditions, and protective devices may operate to protect the equipment. It should be recognized that because of conditions beyond the control of the supplier or user, or both, there will be infrequent and limited periods when sustained voltages outside Range B limits will occur. Outside Range B Service and Utilization Voltage
Insofar as practicable, utilization equipment shall be designed to give acceptable performance in the extremes of the range of utilization voltages, although not necessarily as good performance as in Range A. When they occur, corrective measures shall be undertaken within a reasonable time to improve voltages to meet Range A requirements. Although such conditions are a part of practical operations, they shall be limited in extent, frequency, and duration. Range B includes voltages above and below Range A limits that necessarily result from practical design and operating conditions on supply or user systems, or both. Utilization equipment shall be designed and rated to give fully satisfactory performance throughout this range. 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. The occurrence of service voltages outside of these limits should be infrequent
Maximum voltage for mac air 2010 plus#
It also recommends that feeder (between main panel and subpanel) voltage drop be less than three percent, with the combined voltage drop of branch plus feeder being less than five percent.Įlectric supply systems shall be so designed and operated that most service voltages will be within the limits specified for Range A.
Maximum voltage for mac air 2010 code#
The National Electrical Code (NEC), recommends that voltage drop in branch circuits (sub panel to utilization equipment) be less than three percent. The difference between service and utilization voltage allows for voltage drop in facility wiring between the point of utility delivery and the utilization equipment. Service voltage is measured at the point of delivery utilization voltage is measured at the terminals of the utilizing equipment. Each voltage range is listed for locations: service voltage and utilization voltage. Voltage is divided into two ranges: A and B. Voltage Relationships Based on Voltage Ranges in ANSI C84.1-2016
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