Table 1 Button Colors

General Button

code

one

two

three

four

five

six

color

red

green

black

yellow

blue

white

With light button

note

code

one

two

three

four

five

indicator light

color

red

green

yellow

blue

white

Spherical shape

code

one

two

mushroom button

code

one

two

Lever knob

color

red

green

knob

color

red

green

Note: The neon light in the light button is only red and green; Mushroom buttons with lights come in green, yellow, and blue.

Table 2 Lamp Specifications

code

one

two

three

four

five

indicator light

Incandescent lamp AC DC

Neon lamp AC

voltage

b

twenty-four

one hundred and ten

two hundred and twenty

three hundred and eighty

Table 3: Positions of Knobs, Keyknobs, and Dimensions of Mushroom and Self Locking Knobs

code

two

three

code

one

two

Number of positions

2 positions

3 positions

Button head diameter

φ35

φ65

Note: There is a yellow emergency sign attached to the red mushroom button and self-locking button

Table 4 Types of Light Sources

symbol

N

*

DM

meaning

incandescent lamp

Neon lamp

Symbol incandescent lamp

Mushroom head (φ 35) incandescent lamp

Table 5 Derivative Codes

general form

D

With light button

M

mushroom button

Y

key button

X

knob

CX

Long handle knob

ZS

Self-locking button

CG

Long lever knob

G

Lever knob

QCG

Spherical long lever knob

QG

Spherical lever knob

ZhD

indicator light

DM

Mushroom button with light

Rated insulation voltage Ui

Rated heating current Ith

Rated working voltage Ue