(1)直埋于土中沟底宽:0.4~1.4m;电缆埋深:≥0.7~1m;电缆根数:1~6根。(2)埋设于预制槽盒中沟底宽:0.6~1m;电缆埋深:≥0.7~1m;电缆根数:2~4根。(3)埋设于砖砌槽中沟底宽:0.8~1.2m;电缆埋深:≥0.7~1m;电缆根数:2~4根。