Page 439 - IRSEM_Main Book

Chapter 19: Outdoor Signalling - Installation, Testing and

Maintenance of Equipment

Section 1: General Instructions on Tools

19.1.1 (a) All staff engaged in the installation and maintenance of signalling equipment
shall be in possession of rubber gloves, proper tools pliers, screw drivers,
etc.

(b) While using metal tools like screwdrivers, nose pliers, cutting pliers, etc. near
the working equipment, care shall be taken to avoid short circuiting and
consequent blowing off of the fuse. Adequate number of insulated tools
shall also be maintained.

(c) A list of specific tools to be maintained, shall be circulated by PCSTE as
per specific needs of zonal Railway.

(d) A rubber floor mat shall be used for attending to circuits carrying more than
110 V.

19.1.2 Soldering Care

(a) Staff working in the installation and maintenance of signalling equipment
shall be conversant in use of soldering iron/gun for making good soldering
joints.

(b) Care shall be exercised to avoid dropping of particles of solder and
clippings of wire on adjacent terminals and apparatus.

(c) In addition to soldering irons of adequate wattage (65-125 W), for the type
of work done, the following shall be at hand:

(i) A small file for dressing the soldering tip

(ii) A fire proof pad for wiping the tip

(iii) A mica sheet of adequate size or a suitable stand for soldering iron

(d) Electrical soldering irons shall be switched off when not in use over
extended periods.

(e) While making a soldering joint, the surface shall be thoroughly cleaned,
fluxed and tinned.

(f) Use of too much solder shall be avoided to prevent lumpy connection.

(g) Soldering iron shall not be held on the wire connection for too long to avoid
damage to insulation.

Chapter 19: Installation, Testing & Maintenance of Signalling Equipment Page 387 of 535