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W W
R R
G G
Y Y
CHAPTER 4 HOW TO READ CIRCUIT DIAGRAMS
CHAPTER 4 HOW TO READ CIRCUIT DIAGRAMS
2 2 . . 4 4
E E q q u u i i p p m m e e n n t t
(1) Equipment is r
(1)
Equipment is represented by
(2) The items liste
(2)
The items listed under the
identification of identical items.
identification of identical items.
Equipment number system
Equipment number system
1. 1.
E E qu
quip ipm m e e nt nt na
2 2 . .
B B o o x x
3. 3.
Conn
Co
nnec ecto tor fo
4. 4.
Connec
Con
nector
Item category symbol
Item category symbol
S S y y m m b b o o l l
W W h h i i t t e e
R R e e d d
G G r r e e e e n n
Y Y e e l l l l o o w w
epresented by a box. The sym
a box. The symbol of connector
d under the item categ
item category symbol have a
ory symbol have a specific symbol (
1
1
2
2
nam m e e
r for ha
r harn rnes ess s
tor bel
belong
ongs s to to eq
equip
uipme
ment nt
F F
S S B B F F
S S l l o o w w - - b b l l o o w w f f u u s s e e
L L
B B l l u u e e
L L g g
L L i i g g h h t t g g r r e e e e n n
O O
O O r r a a n n g g e e
G G r r
G G r r a a y y
bol of connector that belongs to
that belongs to the equipmen
specific symbol (equipment num
3
3
4
4
5. 5.
E E qu
quip ipm m e e nt n
6. 6.
Cla
Classi
ssific ficati
7. 7.
It Item
em ca cate tego
I I t t e e m m
F F u u s s e e
S S b b
V V
the equipment is indicated inside
t is indicated inside the box.
equipment number) for classific
ber) for classification of items an
5
5
6
6
7
7
nt num
umb b er er
ation n
on numb
umber (
er (ser
serial ial num
number
ber) )
gory ry sy symb
mbol ol
S S y y m m b b o o l l
M M C C
R R
S S k k y y b b l l u u e e
P P u u r r p p l l e e
4-7
4-7
the box.
ation of items and d
501956
501956
I I t t e e m m
C C o o n n t t a a c c t t o o r r
R R e e s s i i s s t t o o r r
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