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IS 12032-3 (1987): Graphical symbols for diagrams in the
field of electrotechnology, Part 3: Conductors and
connecting devices [ETD 1: Basic Electrotechnical
Standards]
FIELD OF ELECTROTECHNOLOGY
National Foreword
This Indian Standard Part 3 ) which is identical with IEC Pub 617-3 1983 ) ‘Graphical symbols
ror diagrams - Part 3 : Conductors and connecting devices’; issued by the International Electrotechnical
Commission IEC ), was adopted by the Bureau of Indian Standards on the recommendation of the Basic
5lectrotechnical Standards Sectional Committee and approval of the Electrotechnical Division Council.
Cross
Reference
numeric notation
marking and identification of conductors
and apparatus terminals
+ NEW DELHI llCCO2
 
 
 
OIi-OlM
When a single line represents a group of con-
ductors, their number may be indicated
either by adding small strokes or one stroke
and a figure.
follows:
distribution, frequency and voltage;
the circuit followed by a multiplication sign
and the cross-sectional area of each conduc-
tor. If different sizes of conductors are used,
their particulars should be separated by a
plus sign. The conductor material may be in-
dicated by its chemical symbol.
034144
Examples:
of 120 mm*
120 mm< with neutral of 50 mm’
03-01-06
03-01-08
The note with symbol 03-01-09 applies
3
Note. If several conductors are in a cable (or twisted
together or in a screen) but the lines represent-
ing them on a diagram are not adjacent to each
other, the method shown below may be used.
03-01-10
Example:
03-01-11
03-01-12
axial side.
--
03-01-1s
lated
4
No.
Symbol
3342-01
0
B-02-03
034254
l-
0342-10
3-1
10
Nore. - The total number of similar items may be indi-
cated by a figure near the common connection
symbol.
Example:
03-02-11
i
II
inversion of polarity, shown for n conductors in single-
line representation
Publication 445: Identification of Apparatus
TerminaIs and General Rules for a Uniform
System of Terminal Marking, Using an
AIphanumeric Notation, applies.
lin epresentation
03-U 14
phase brought out, shown with external neutral point
6
03-03-06
_ t_
03-03-07
--I+-
zz
Connector assembly, fixed portion
Note. - The symbol should be used only when it is de-
sired to distinguish between the fixed and free
parts of the connector assembly.
03-03-10
iI
0343-11
-al-
side movable
7
Note. - The longest pole on the plug symbol represents
the tip of the plug, and the shortest the sleeve.
The note with symbol 03-03-12 applies
Break or isolating jack, telephone type
Coaxial plug and socket
Note. - If the coaxial plug or socket is connected to a
coaxial pair, the tangential line(s) should be ap-
propriately extended.
male-male
03-03-21
male-female
03-03-22
03++&? =4==
Straight-through joint box, shown with three conduc-
03-04-03 + Zli-line representation
nections:
cables
Note. - The high pressure side is the longer side of the
trapezoid thus retaining gland in bulk-head.
9