The Square D 100 Amp Load Center consists of several key components.
Knowing what each component does and how they interact with one another is essential for any electrical project.Ĭomponents of a Square D 100 Amp Load Center It provides a comprehensive look at the various circuits, switches, and components that work together to make sure that the loads on the circuit are properly distributed. The Square D 100 Amp Load Center Wiring Diagram is a highly detailed and comprehensive diagram of the load center’s power distribution system. By taking the time to understand how the wiring works, you’ll be able to more easily plan out and execute your project. This guide will provide you with a comprehensive look at the Square D 100 Amp Load Center Wiring Diagram specifically. Whether you’re an experienced electrician or a novice DIYer, understanding the basics of a wiring diagram can help ensure that your project is a success. Wiring diagrams are essential for any electrical project. So "staying with Square D brand" does you absolutely nothing unless you stay with QO, which is a costly (but quite good) industrial-tier panel.A Guide to Understanding Square D 100 Amp Load Center Wiring Diagrams HOM and QO are 100% incompatible and share nothing except enclosures. And running out of spaces is very costly. Spaces are actually cheap, the cost diff to a "plenty of spaces" panel is pretty minimal. using the most el-cheapo panel on the market, HOMeline. Of course, the "thrifty gene" motivates us to "think cheap" and try to chintz out as much as possible, e.g. The #1 priority when selecting a subpanel is breaker spaces. Forgive yourself the error of "buying before researching", and get the item that's right for you. I already have the HL panel mounted to the wall.ĭon't get swept into the "fallacy of sunk costs", trying to force a wrong thing to work merely because you already own it. If cost was no object or if distance was very short, I'd run 2/0 copper, which is 175A and could actually carry an entire 200A service due to 310.15(B)(7). The largest readily available QO breaker is 125A. The larger wire will allow upgrading the capacity later simply by enlarging the breaker. I'd use the smallest breaker that will do the job for now, since cost is a concern. I think I would run 2/0 aluminum wire (135A) which is the largest wire that will fit on a "QO" 80A through 125A breaker.
I'm OK with bring 200A to the sub, but the cost of the QO2225SL subfeed lug will be prohibitive. You implement this feature by choosing EVSE's designed to work with each other via Share2. It dynamically allocates current according to the EVs' needs and abilities. There is even a way for multiple EVs to share a single current allocation, called "Share2". EV charging is actually pretty sophisticated, and they've thought of everything. So if your Load Calculation won't support 80A, you can simply change the commissioning settings on the EVSE to set the current you have available. The Load Calculation will tell you whether the house's service can support all this stuff, and how big subpanels need to be.Įlectric Vehicle charging is adjustable. That is the proper and NEC-specified procedure for determining the load on a panel or service. A Load Calculation is seriously warranted here. You would need a QO2225SL subfeed lug kit, with 200A wire to a 200A subpanel. That's perfectly allowed if you want to do it.
So to use a subfeed lug kit, a) the lug kit must be >=200A, b) the wires must be >=200A and c) the subpanel must be >=200A. If your entire service is 200A, rule 310.15(B)(7) kicks in, allowing 4/0 aluminum or 2/0 copper.200A wire is 250 kcmil aluminum or 3/0 copper.So not only must you use a 200A subfeed lug kit, you must use 200A wire. You can't protect 125A wire with a 200A breaker. They too need to be behind breaker protection. The wires beyond the lug kit are in the same situation. The only subfeed lug kit you can use is 200A. Since your main breaker is 200A, and a subfeed lug kit has no breaker, it means a 125A subfeed lug kit is simply not usable in your panel as nothing protects it. It fits where breakers go, but has no breaker. A subfeed lug kit and the wires behind it must be protected by a breaker.Įlectrical equipment and wiring must be protected by a circuit breaker.Ī subfeed lug kit is Square D's name for the thing.
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