I'm looking for feedback on my plan before I begin the panel replacement, so thanks for your input. I already have a permit and am allowed to do all the work myself as long as it passes 2014 NEC code upon inspection.
My primary goal is to remove the 60 yr old aluminum wire and replace with copper and upgrade the panel box replacing all breakers as every current breaker is some weird double breaker that has two flip switches and two circuits in every slot on the box. Not enough room in current box if removing all doubles for singles.
I'm done running new wire throughout the house and ready to shove the new home run wires to the new box, this is where i have uncertainty as I'm trying to future proof. I anticipate a second HVAC for the second floor (i live in the south and this is the standard now for getting the upstairs below 85 in summer). Thus, future box would have about 15 20AMP breakers, 4 50 AMP breakers (HVAC) 3 30 AMP (tankless water heater) one stove at 40 AMP and dryer at 30 AMP. (presently have 1 30 for tank water heater and a 70/50 for hvac, which is oversight from hvac replacement done last summer and should be 50/50). I have a 200 AMP service presently, if i require more the local company will run a second 200AMP line to the house.
- My Amperage total in these breakers is way over 200, i understand not all are used simultaneously such as AC/Heat, etc, but should i consider the upgrade to 400?
- the HVAC and water heater are all in the crawlspace (in this area my crawlspace is 7ft tall with plenty of access space), I think it would be wise to run 1 25 ft #6 wire from the panel (or second 200 AMP service) using a 100AMP breaker and create a subpanel (or second panel entirely with service upgrade) then run #6 CU wire to the HVAC and water heater, this would be 10-15ft for each. This excludes the second floor airflow handler that would eventually be in the attic- that is going to be directly above the main panel and would likely run it through that panel to keep wire distance shortest.
- What am I overlooking?
Based on feedback, further research and opening up my panel box. I'm thinking I'll consider not replacing the panel as i have a 200 30/42 box, but several of these tandem breakers are not in proper slots so I can fix that while ripping out all the AL wire and putting in new breakers and CU- I may do away with most of them as they're unneeded if i do the subpanel. I still think a sub panel is a good idea given all the big stuff is centralized - even though that means a flipped breaker would be under the house...
New question, last time i was in the box replacing a breaker that was shooting sparks into the house i thought my main lines were copper, they clearly are not. an electrician friend thinks they look fine, but should i consider a CU replacement all the way to the meter?
on the left is my trial/error breaker description, on the right is a hole patch from previous owner, not sure what the reason was