With no de-rating, all resistors can be used up to 1000 meters altitude. Above this, as a rule of thumb, the following de-rating should be used:
1500m 0.94 x Pn
3000m 0.82 x Pn
With no de-rating, all resistors can be used up to 1000 meters altitude. Above this, as a rule of thumb, the following de-rating should be used:
1500m 0.94 x Pn
3000m 0.82 x Pn
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