Blue
Black
Green
Red
Not more than 8 ohm
Not more than 3 ohm
Not more than 2 ohm
Not more than 1 ohm
1
2
3
4
By connecting two earth in series
By adding more charcole
By connecting to earth in parallel
By adding more salt
Not less than 22.88 cm
Not less than 18.4 cm
Not less than 15.8 cm
Not less than 10.2 cm