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Electrical Requirements and Breaker Selection

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HOW TO INSTALL IYILO 48 AMP HARDWIRED EV CHARGER! | Day in the Life of a Residential Electrician

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What happens here

The installer details the electrical requirements for the Level 2 EV charger. A double-pole circuit breaker is essential for the 240V supply. For this specific installation, a 40-amp double-pole Square D QO circuit breaker will be used, given the customer's 100-amp electrical panel and load calculations. The charger can accommodate breakers from 20 amps to 60 amps, allowing for de-rating based on panel capacity. With a 40-amp breaker, the charger will provide a continuous output of 32 amps. The wiring chosen for this installation is 8/2 Romex, which is appropriately rated for a 40-amp circuit.

Goal: Understand the circuit breaker and wiring specifications

Tools and materials

  • 8/2 Romex Wire Romex — To supply power from the electrical panel to the EV charger

What they say

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So when you install this charger, you must have a double pole circuit breaker. You must have a double pole circuit breaker, which I have right here. So this customer has a 100-A electrical panel. So we are installing a 40-A circuit breaker with this charger due to load calculation, load demands. And this charger you can install up to a 60-A circuit breaker. But in this case, we're installing a 40-A because you're able to derate it. You can install a 60-A breaker, you can install a 50-A breaker, you can install a 40-A circuit breaker. Uh and even as low as to a 20-A double pole circuit breaker. Nice thing about it is that, you know, cuz sometimes you can't do that full 60-A. It's a 25-ft long cord. And overall, looks really nice. So, we're going to get to the install. We're using 8/2 Romex wire because 8/2 8-gauge is rated for 40 amps. This charger is going to be putting out a 32 continuous amps as we're putting in a 40-amp circuit breaker. All right, guys. So, let's get to it. All right. So,

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