| 摘要 |
PURPOSE:To save manufacturing cost of protector or fixing cost by employing a direct burying cable which can withstand against impact of concrete or thermal and chemical degradation due to concrete. CONSTITUTION:A direct burying cable 1 is employed for a indoor electric circuit of 200V where a cable comprising a conductor having nominal cross-sectional area of 0.055cm<2> or less is laid in a concrete structure 9. The direct burying cable is buried directly in the concrete structure 9 without employing any intermediary material. The direct burying cable 1 is constructed to withstand against impact of concrete or thermal and chemical deterioration due to concrete. The direct burying cable 1 is buried in the concrete structure 9 3cm deep or more (except the lead out port of the cable l), binding interval of cable l of about 70cm, and the minimum isolation distance from other piping of about 3cm. According to the method, manufacturing cost of protector, fixing cost, and the like can be reduced. |
