Page 101 - Electrician - TT (Volume 1)

ELECTRICIAN - CITS

PVC casing capping
Nowadays wooden casing capping is replaced by PVC casing capping

Comparison of different systems of wiring

Particulars Cleat Casing and Batten Lead sheathed Conduit Wiring
wiring Capping wiring Wiring wiring
Material Cleats , Casing and T.W batten T.W Batten Conduits Bent
VIR or PVC capping (T.W, TRS/CTS wires Lead covered and Sockets
cables, PVC). VIR/PVC Gutties Screws wire Gutties and other
screws wires Wooden Nails Link Screws, clips accessories
Gutties , Gutties clips Blocks Board and VIR or PVC
Block Screws, Block and Boards Blocks cables Nails
board etc and Boards Gutties Block
sand Boards
Cost Cheap Fairly expensive Cheap Expensive Expensive

Life Short Fairly long Long Long Very Long
Mechanical None Fair Fair Good Very Good
protection
Protection No protec Bad Fair Good Very Good
from fire tion
Safety from No protec Fair(PVC) Good Good
Dampness tion Little(wooden)
Labour Skilled Highly Skilled Skilled Highly
Skilled Skilled
Extension Easy Difficult Easy Difficult Not so easy
and renewal and costly

Time required Short Fairly long Short Fairly long Very much longer
for erection

General Poor Good Good Fairly good Very good
reliability

Appearance Bad Good Good Good Very good
Nature of Temporary Domestic, Domestic and Domestic and Domestic, Office,
Application Office office building office building Work shop

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CITS : Power - Electrician & Wireman - Lesson 20-25