I'm in the process of buying a house under construction. I am allowed to make a few customizations, including electrical circuits but I'm running into some issues with this. First, the house has a 200-amp service from the power company. Second, the house has a detached garage in addition to a 2 and 1-car attached garage. My plan is to make the detached garage be my "computer lab", where I will have several computer servers running. I plan on adding a ductless mini-split air conditioner/heater to maintain proper/comfortable temperatures. I see that most manufacturers call for 240V-15A circuits, but the lowest amp option the builder gave me was a dedicated 30A circuit. I also added two dedicated 20-amp 120V circuits and the standard 15-amp circuit to power lights and possibly a garage door opener. The detached garage has a 135A sub-panel and a 2" conduit for electrical wires between the attached garage and the detached garage. In addition to all this, I want to add a spa in the backyard and it will require a 240V-50A circuit. I was told that this would pull too much for the gauge wire that can run through the 2" conduit, so I'm not allowed to have both the 30A and 50A circuits on the detached garage.
In addition to my detached garage, I wanted two additional dedicated circuits; one inside the attached garage and one on the side of the attached garage... both on the same wall as the main breaker box. I had asked for both to be 240V-50A, although in both cases, I know it is overkill for my current needs. I presently own a travel trailer with a 120V-30A power system... but in the future, I may want to get one with a 240V-50A power system and figured I'd prepare for that possibility now; this is what would be on the outside of the garage... on the driveway leading back to the detached garage. The other circuit is for our plug-in vehicles. I presently own two plug-in hybrids and would one day, get a Tesla. Both of our vehicles can only charge at a slower rate and only pull 240V @16A. Even if I put in a 40-amp charger on a 50-amp circuit, my car would only charge at the lower amperage rate. As I said though, I would one day like to get something that will need to charge at a higher current.
I am being told that I can't have all that I want, so I came up with an alternative workaround... for them to do what will be difficult to upgrade later and leave what I think will be an easier upgrade for after the purchase. When I realized that the reason I couldn't have both the 30A and 50A 240V circuits on the garage was due to the conduit in place, I then realized that if I routed the 50A circuit for the hot tub to the house instead of the detached garage, it would be using "Romex" through the structure and not through conduit that was already placed underground and concrete footings poured around. This gives me the 30A for the ductless mini-split and the 50A for the hot tub to the rear of the property. They have already placed a 4"x4" electrical outlet box and a very short conduit from the main electrical panel to the inside of the garage and it would be easier to run power through the side-wall of the garage to the outside by an electrician in the future.
Now, after all the set-up, here are my questions. Am I going to have issues with electrical code for adding the two 240V-50A circuits I want in the future? Will I be told that the sum of the circuit amperage exceeds the 200-amp supply? I know that some of it is overkill and I will seldom be pulling that much load. Also, I know that the house is wired for a 240V clothes dryer but also has natural gas hookups... I use a natural gas clothes dryer, so the 240V will not be used.
In addition to my detached garage, I wanted two additional dedicated circuits; one inside the attached garage and one on the side of the attached garage... both on the same wall as the main breaker box. I had asked for both to be 240V-50A, although in both cases, I know it is overkill for my current needs. I presently own a travel trailer with a 120V-30A power system... but in the future, I may want to get one with a 240V-50A power system and figured I'd prepare for that possibility now; this is what would be on the outside of the garage... on the driveway leading back to the detached garage. The other circuit is for our plug-in vehicles. I presently own two plug-in hybrids and would one day, get a Tesla. Both of our vehicles can only charge at a slower rate and only pull 240V @16A. Even if I put in a 40-amp charger on a 50-amp circuit, my car would only charge at the lower amperage rate. As I said though, I would one day like to get something that will need to charge at a higher current.
I am being told that I can't have all that I want, so I came up with an alternative workaround... for them to do what will be difficult to upgrade later and leave what I think will be an easier upgrade for after the purchase. When I realized that the reason I couldn't have both the 30A and 50A 240V circuits on the garage was due to the conduit in place, I then realized that if I routed the 50A circuit for the hot tub to the house instead of the detached garage, it would be using "Romex" through the structure and not through conduit that was already placed underground and concrete footings poured around. This gives me the 30A for the ductless mini-split and the 50A for the hot tub to the rear of the property. They have already placed a 4"x4" electrical outlet box and a very short conduit from the main electrical panel to the inside of the garage and it would be easier to run power through the side-wall of the garage to the outside by an electrician in the future.
Now, after all the set-up, here are my questions. Am I going to have issues with electrical code for adding the two 240V-50A circuits I want in the future? Will I be told that the sum of the circuit amperage exceeds the 200-amp supply? I know that some of it is overkill and I will seldom be pulling that much load. Also, I know that the house is wired for a 240V clothes dryer but also has natural gas hookups... I use a natural gas clothes dryer, so the 240V will not be used.
