Bob Silva
Member
- Location
- Hudson, Ma
I've seen many posts about 352.44, and apologize upfront if this is redundant.
Recently had an inspector require a 2" PVC expansion coupling between a meter socket and a PVC 45 elbow. The length of straight PVC run between the meter socket and PVC 45 elbow is 7+/- feet. Needless to say I installed the coupling so I could move forward to other things.
That said, and to my question, does the NEC provide guidance for determining adjustment factor for the sun? Specifically, I am trying to compensate for the radiant temperature rise - impact of direct or indirect sun-light. The required 352.44 calculation was done, and it doesn't seem like this particular installation will exceed the 1/4" expansion threshold. I used the temperature data I have available, which i pulled from ASHRE and local weather history.
The only thing I can see that would skew my number is the impact of direct or indirect sun-light. For what it is worth, the installation was performed at +/- 70 degrees. We typically see highs around 90 & lows in the low teens. On rare occasion may see temps reach close to 100 degrees with lows dipping into the single digits.
Recently had an inspector require a 2" PVC expansion coupling between a meter socket and a PVC 45 elbow. The length of straight PVC run between the meter socket and PVC 45 elbow is 7+/- feet. Needless to say I installed the coupling so I could move forward to other things.
That said, and to my question, does the NEC provide guidance for determining adjustment factor for the sun? Specifically, I am trying to compensate for the radiant temperature rise - impact of direct or indirect sun-light. The required 352.44 calculation was done, and it doesn't seem like this particular installation will exceed the 1/4" expansion threshold. I used the temperature data I have available, which i pulled from ASHRE and local weather history.
The only thing I can see that would skew my number is the impact of direct or indirect sun-light. For what it is worth, the installation was performed at +/- 70 degrees. We typically see highs around 90 & lows in the low teens. On rare occasion may see temps reach close to 100 degrees with lows dipping into the single digits.
