For sub-panel wiring 2 conductors aluminum and copper used.On the bases of 50 amp sub panel needed least wire size is 6 AWG for copper material conductors and 4 AWG for conductors created with aluminum. The National Electrical Code have different guiflines for selection of wrie size for different applications. To make sure effective pannal installation voltage losses must be controlledĬhoosing the Right Wire Gauge for a 50 Amp Sub Panel National Electrical Code (NEC) Guidelines High voltae loss can casues in faulty operating devices and error power supply. Voltage loss occurs when current passes through wire and redcues voltage according to length.For the 50 amp sub panel, higest current value is known Check the device and component connected with the panel and their ratings, Add all loads to get the total current need.
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