- Square d 200 amp breaker box wiring diagram how to#
- Square d 200 amp breaker box wiring diagram code#
Square d 200 amp breaker box wiring diagram how to#
What’s more, you need to know how it works and how to wire it properly to ensure a safe and efficient electrical system. and you touching something energized - and you're doing the 60 cycle shuffle.No matter the size of your home, if it is powered by electricity, it needs a breaker box. In the event of a fault, your ground conductor has assumed the role of the return path for current and now everything that you've grounded (sub-panel, appliances, metal fixtures, etc) to that sub-panel is now hot.Īll it takes is a preexisting fault, one rainstorm, or wet feet, whatever. Why is this? When you tie neutral to earth ground in a subpanel, you create a potential parallel path for current to return via earth (ground). DO NOT DO NOT DO NOT bond neutral to ground in a sub-panel. However, any sub-panel after the primary service from there MUST have an isolated neutral. I can completely understand how this can seem incorrect from a common sense perspective. It just doesn't "look right" based on how the other panel is made up. Based on your description, it sounds like your panels are wired correctly. You should see the ground lead and neutral tied to the same bus (the neutral bus bar). :)Īt the service panel (ONLY AT THE SERVICE PANEL - HUGELY IMPORTANT) the neutral bus bar is bonded to ground. The wiring issue is not a matter of pride, neatness or whatever. So grounded (neutral), and equipment grounding conductors cannot be mixed. In the subpanel, the bus bars are kept separate. Which means that both grounded (neutral), and equipment grounding conductors can be terminated on either bus bar.
This means that electrically speaking, they can be considered a single bus bar.
Notice how the grounded, and grounding bus bars are connected in the main service panel. If the two bus bars are not connected as would be the case anywhere other than the main disconnect ( exceptions exist), then you cannot mix them.
If the main service panel happens to be the same place that the grounded (neutral) conductor is bonded to the grounding electrode, then there is no problem mixing grounds and neutrals on the same bus bar (as long as there is an appropriate number of conductors terminated under each lug). This means that the grounded (neutral) conductors should only be grounded at the main service disconnnect. A grounded conductor shall not be connected to normally non–current carrying metal parts of equipment, to equipment grounding conductor(s), or be reconnected to ground on the load side of the service disconnecting means except as otherwise permitted in this article. This means that the grounded (neutral) from the service must be connected to ground, and that the connection can be made by bonding the neutral bus bar to the grounding electrode. The grounding electrode conductor connection shall be made at any accessible point from the load end of the overhead service conductors, service drop, underground service conductors, or service lateral to and including the terminal or bus to which the grounded service conductor is connected at the service disconnecting means. A premises wiring system supplied by a grounded ac service shall have a grounding electrode conductor connected to the grounded service conductor, at each service, in accordance with 250.24(A)(1) through (A)(5). System GroundingĢ50.24 Grounding Service-Supplied Alternating-Current Systems.
Square d 200 amp breaker box wiring diagram code#
National Electrical Code 2014 Article 250 Grounding and Bonding II.
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