Mike Dolt Enterprises
Mike Dolt Enterprises
User: knoppdude, Location: Sacramento,ca
Asked on: Saturday, April 16, 2011 at 10:40 pm EDT
Answered on: Tuesday, May 14, 2024 at 4:16 am EDT
Question: Have a residential customer with a 200 amp panel, that has way too many circuits filling it, to the point that grounded conductors are being doubled and triple up on the terminal strip. What I am going to suggest to him is that he upsize the service to supply two 200 amp panels, and split up the circuitry. I have to do some load work on his house, but it is in need of more panel space, and this is the only way I can think of to accomplish this. Most of the wiring has been done by a handy man, so there are many problems beyond this, which I will bring to his attention as they are uncovered. Has anyone had experience doubling up on residential panels, and how did it work out?
Doubling Up on Residential Panels
It is generally not recommended to double up on residential panels for several reasons: Safety Hazard
Overcrowding a panel increases the risk of electrical fires due to overheating and loose connections.
Code Violations
National Electrical Code (NEC) prohibits double-tapping or paralleling the main lugs of a panel.
Increased Power Demand
Increasing the number of circuits without upgrading the service may overload the existing system.
Panel Capacity
A 200-amp panel has a maximum capacity of 200 amps. Adding another 200-amp panel in parallel does not double the capacity, as the main breaker still limits the total current to 200 amps.
Difficulty in Troubleshooting
Doubled panels can make it challenging to trace circuit problems and identify tripped breakers.
Warranty Issues
Most panel manufacturers void warranties if the panel is overcrowded or modified in any way.
Recommended Solution: Upsizing the Service
Upgrading the service to two 200-amp panels is a viable solution to address the customer's need for more panel space. Here's the recommended approach:1. Load Calculation
Perform a load calculation to determine the total electrical load on the house. This will help determine the appropriate size for the new service.2.
Permit and Inspection
Obtain a permit from the local electrical authority and schedule a final inspection after the upgrade is complete.3.
Disconnect and Upgrade
Disconnect the existing service and install the upgraded service equipment, including two 200-amp panels.4.
Circuit Relocation
Split up the existing circuits and relocate them to the two new panels. Ensure that all circuits are properly labeled and protected.5.
Final Inspection
Schedule a final inspection with the electrical authority to verify code compliance and safety.
Benefits of Upsizing
Increased Panel Capacity
Two 200-amp panels provide ample space for future circuit additions.
Improved Safety
Avoids overloading and potential fire hazards associated with doubled panels.
Code Compliance
Meets NEC requirements for proper panel installation.
Warranty Coverage
Ensures the new panels are covered by the manufacturer's warranty.*
Easier Troubleshooting
Distinct panels make it easier to identify and resolve circuit issues.
Note: It is important to work with a qualified electrician to ensure that the upgrade is done safely and in accordance with applicable codes and standards. Flag for review