You are correct. You need to use the 22-degree temperature adder.NEC 310.15(B)(2)(c) states that:> "Where conductors are exposed to direct sunlight, the ambient temperature shall be increased by 13°F (7°C) (See Table 310.15(B)(2) Exception [through 310.15(B)(2)(d)].

Exception

> The ambient temperature increase for direct sunlight exposure shall not apply to conductors installed in the following locations:>> (c) Any portion of the conductor that is 3 1/2 inches (89 mm) or more from the surface on which it is supported and is not otherwise exposed to direct sunlight.In your case, the conduit is less than 3 1/2 inches from the masonry wall, so the exception does not apply. Therefore, you must add the 13-degree temperature adder for direct sunlight exposure.However, you are also running your conduit vertically up an east-facing wall.

NEC 310.15(B)(2)(b) states that:> "For conductors installed outdoors on the north side of buildings or walls that are not subject to direct sunlight, the ambient temperature shall be reduced by 13°F (7°C)."Since your conduit is on the east side of the building, it is not subject to direct sunlight in the morning. Therefore, you can reduce the ambient temperature by 13 degrees for the portion of the conduit that is on the east side of the building.

Conclusion:

Overall, you will need to use the 22-degree temperature adder (13 degrees for direct sunlight exposure + 9 degrees for east-facing wall) for the portion of the conduit that is less than 3 1/2 inches from the masonry wall and exposed to direct sunlight. However, you can reduce the temperature adder by 13 degrees for the portion of the conduit that is on the east side of the building and not exposed to direct sunlight. Flag for review