We all know lighting load is considered as one of continuos loads, and we have to design the branch circuit and the over-current protection at 125% of design load(NEC 210.19.A.1).I know the fact in it, and I can understand the practicality. But I fail to observe in the NEC or IEEE standards, stipulating that, the lighting load demand factor to be considered or written down at 125%, while calculating building or part of the building load, contrary to Table 220-11 of NEC 2002 OR Table 220-42 of NEC 2005. I was told that most of the counties are requiring this for permit issue. May anyone help me to have the NEC or any appropriate mandatory building codes reference or National/International standards that specifically stating the demand factor of 125% to be used for lighting loads calculations? Thanks