#Wire size for 100 amp entrance install#
#Wire size for 100 amp entrance code#

#Wire size for 100 amp entrance code#

#2 aluminum is an extremely popular size, because a special exception in Code allows it to be used for 100A services which power a dwelling. Yes, there was a 'thing', but it doesn't relate to large wires, for known reasons. There is nothing wrong with aluminum wire at these large feeder sizes. That would be #4 copper, or #2 aluminum for 85A or 90A, respectively. Good or bad, doesn’t matter id love to hear it. And I can save some money by going with a smaller wire and panel.Īny thoughts on any of the above is appreciated. I ask because most people I’ve talked to have said I may be overshooting my target with this project. My question is, does a copper 2-2-2-4 wire sound correct for an 80amp subpanel 100ft away from the main panel? And is 80amps overkill for the items im attempting to supply power to now and in the possibility future? In the future I may add a 230VOLT compressor and a EV charger, so im shooting for an 80amp subpanel to leave my options open. Im hoping to power a Bridgeport Mill (5.6amps), a Leblond Lathe (2.2 Amps), and a 220volt welder.

Using this website ( 100 Amp Wire Size: Which AWG Wire For 100 Amps? (NEC Code)) I’ve calculated that I will be needing to use a 2-2-2-4 CU wire that can handle 115amps. The garage is attached to the home but is on the far opposite corner of the house from the main panel.If I run the wiring internally through the walls and attic I’m measuring a 100ft run.

#Wire size for 100 amp entrance install#

I’ve been doing som research to install an 80amp subpanel in my garage. This prevents the conductor’s operating temperature from adversely affecting the overcurrent device.I’m not a trained electrician. Rule 4-006 requires conductors to be sized using temperature columns in tables 1-4 which correspond with the termination temperature rating marked on equipment. Insulated conductors available in Canada are primarily supplied with a 90C insulation rating. Table 2 requires a #3/0 AWG Cu service conductor to be used to supply this installation. A load calculation determines the load as being 180 A. Minimum ampacity of service conductors shall be the greater of 8-200 1) a) or 1) b). When selecting the service conductors from the 75 degree column of Table 4, a #1 AWG service conductor is to be used to supply this installation.Įxample 2– Single family dwelling with 105m2 total floor area supplied with copper conductors and equipment marked as 75 degrees.

In this example, the total floor area (>80m2) and based on area will require the minimum 100-amp service.

A load calculation determines the load as being 95A. When determining the size of service and feeder conductors for single dwellings and feeder conductors supplying single dwelling units of row housing, apartments, and similar buildings, several rules throughout the code provide guidance in selecting the appropriate size - specifically rules 4-004, 4-006, 8-104 1, 8-106, 8-200 1, and 8-202 1Įxample 1– Single family dwelling with 105m2 total floor area supplied with aluminum service conductors, and equipment marked as 75 degrees. Rule 4-004 Ampacity of wires and cables (see Appendix B) Installers should consult with local authorities having jurisdiction before starting work to determine their requirements. The requirements of local municipal authorities having jurisdiction may vary. This bulletin provides guidance on the application of rules in the 2018 BC Electrical Code Regulation.