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解析:1.照明回路N1、N2、N3:
(1)JDG20(穿4根NHBV2.5mm²线)工程量计算:
(4.9-0.1+0.05-1.6-0.6)×3+(1.9+10.1+3.2)+4.1×5+2.7×2+(2.5+2+2)+(4.9-0.1+0.05-1.3)×3+3.4+3.9=73.50(m)
(2)JDG25(穿5根NHBV2.5mm²线)工程量计算:2.7×2+4.1+4.1=13.60(m)
(3)管内穿NHBV2.5mm²线:(0.5+0.6)×4×3+73.50×4+13.60×5=375.20(m)
2.插座回路:
(1)S1、S2回路JDG20(穿3根BV2.5mm²线)工程量计算:
(1.6+0.05)×2+(4.2+4.4+9.3+4.4+5.4+9.5)+(0.3+0.05)×11+(3.4+3.2+4.5)+(0.3+0.05)×5=57.20(m)
(2)管内穿BV2.5mm²线:(0.5+0.6)×3×2+57.20×3=178.20(m)
(3)K1、K2回路JDG25(穿5根BV4mm²线)工程量计算:
(1.6+0.05)×2+(6.9+16.3)+(0.3+0.05)×2=27.20(m)
(4)管内穿BV4mm²线:(0.5+0.6)×5×2+27.20×5+(0.3+0.3)×5×2=153.00(m)
具体见表3-Ⅲ-6-5。

3.189.5×1.6+45.5+4000+(1.7×1.6+1.7)×18+(2.4×1.6+1.7)×10=4483.66(元)