Method for Installation of Conceal & Surface Conduits (Part-1)

METHOD FOR INSTALLATION OF CONCEAL & SURFACE CONDUITS (PART-1)

(A) PURPOSE: .

This method explains the sequence of activity for safely installation of PVC / GI Conduits and it’s accessories in the concrete slabs / columns, in block works and on Surface as per the standard Practice and Code.

(B) STORAGE & MATERIAL HANDLING:.

The storage area must be free from dust and Water leakages / seepages. * Manufacturer recommendation shall always be followed in loading/unloading and storing of Material. * Material and its accessories shall be unloaded handle with care in designated area of the Store (Do not directly drop to Ground) to avoid any damages. * Materials shall be stored in a dry place which is free from water or from weather effects and protection should be given to the material by means of covering the material with Tarpaulin sheet. * The Material will be stacked / unload in the site store on a proper stand on wooden loft on a flat surface at a sufficient height from Ground. * If Material are dispatch in packs or pallets, each pack or pallet shall be lifted individually with suitable lifting equipment. * The material shall be transported / Shifted in their original packing to Site location. * The Material should be visually inspected for damage, which may have occurred during transport. * If the Material is found defective it shall not be installed and the cable shall be returned to the supplier for replacement.

Check The Material according to its Type, Size, Make * Visual inspection: * Type and Make of Conduit and Accessories Material * Length , Width and thickness of PVC / GI / MS Conduit Material and Accessories * Physical Damages Inspection: * Damage on Material and it’s Accessories * In case of any damages observed during inspection, the concern report will be issued and Material shall be returned to the supplier for replacement.

(D) CONCEALED CONDUIT IN SLAB / COLUMN:.

PVC Conduit and its accessories shall be carefully unloaded or shifted to the site by using Crane/Hydra or by sufficient manpower and moved to a defined installation location. * Remove the packing and ensure that the material is free from transportation damages * Check and ensure that approved drawings, the correct size and type of Conduit & its accessories are ready for installation. * Ensure that Conduit and its accessories received from site store for the installation are free of rusty parts and damages.

Ensure that the civil activities are finished I,e Slab Shuttering Work and Steel Work and Site is ready for Electrical Work on Slab. * After completing the first layer of steel, start marking of Ceiling Points and Wall Drop Points on Slab as per approved Site Drawings. * Mark first the wall location for lower floor in slab as per latest Architecture layout so that it will be easy to locate the drops for switch, Wall Light Points and any other drops required for electrical system. * Mark the opening size in Slab or in Beam i.e window, door and shaft as per approved electrical drawing to avoid passing wall conduit drop on that area. * Mark the Electrical points on the slab, Wall Conduit Drop in Beam as per approved Electrical Shop Drawing. * Make sure that marking of Wall conduit drop is placed in center of wall, it is not out from wall or not move to any face of wall. * For initially use marker / Chalk for making location of electrical point on slab and wall drop after that apply oil paint on that location before conducting work so after de shuttering ,the JB or conduit drop is easily visible on slab or on beam.

Chalk will be used to mark the PVC conduit route. Make sure that size of conduit is as per approved Electrical Shop Drawing. * Ceiling Conduits shall be laid on the prepared shuttering work of the ceiling slab before concrete is poured. The conduits, boxes, accessories, joints, etc. shall be laid along with the conduits. * Use Deep Junction Box for surface mounted lighting Fixtures and for Cable Pulling. * Use long radius bend or make as per site requirement by using PVC Conduit bending spring. * Joints between PVC conduit + fittings shall be made with suitable adhesive. * Try to avoid the overlapping of conduits and keep some distance between the conduits for low current and power/Lights. * To maintain at least 20mm spacing gap between PVC conduits running in parallel. To allow adequate / sufficient space between formwork and conduit so that embedded conduit is fully covered by concrete and will not result in any honeycomb or structural defects in the future. * Concealed conduits in slabs shall be brought out as vertical drops in beams, wherever such drops are required. All vertical conduits in beams shall be left protecting …