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Safety Notes

1 Selection...

1

Select products within the compatible current / voltage range.
Generally, from the safety point of view, it is preferable to select the rated current of the load devices within about 80% of the rated current of the wiring devices.

2

Select devices appropriate to usage, location and environment. (Using female side devices such as receptacle, connector body etc. for power supply equipment or using water proof equipment for outdoor conditions etc.)

2 Construction...

1

Generally, installation of wiring devices and wiring works must be conducted by a qualified electrician.

2

Using crimp terminals is recommended to ensure a more reliable connection.
Use crimp tools specified by JIS C9711.
When connecting a small number of strands by push-in-screw Terminal method, wire characteristics may cause strand deviation in rare cases. Please remember, that it may cause heat generation or fire. Check tightening of wire connections carefully during work.

3

Use proper drivers (bits) to tighten terminal screws.
If possible, use a torque screwdriver and tighten screws securely with appropriate tightening torque.
Loose screws can cause heat generation.

■Appropriate tightening torque of terminal screws (reference values)

Nominal diameter of terminal screw M3.5 M4 M4.5 M5 M6
Tightening torque (N・m) 0.8 1.2 1.5 2.0 2.5
Tightening torque (kgf・cm) 8.1 12.2 15.3 20.4 25.5
++Driver bit type No.2 No.3

We recommend using tightening torques within 80-100% of values in the above table. (The values are according to JIS C 8306)

4

Use flat head screws as mounting screws for receptacles. Using screws other than specified may cause lifting or deformation of the plate.

5

Tighten plate mounting screws evenly with a proper torque. Excessive tightening torque may cause deformation, cracks, degradation of waterproof properties, etc. (recommended value: 0.4N・m)

6

Securely tighten screws of cord stoppers (cord grips) of plugs, connector body, etc.
If the gap between the cable opening and the cable is too large, reduce it using bushing tubes or similar parts.
Insufficient tightening of cord grips may cause loosening of terminal screws, leading to heat generation or fire.

7

Use only specially designed devices in bathrooms, kitchens and other places in contact with water, with high or low temperatures, high levels of moisture or dust. Using other devices may cause heat generation or fire.

8

Use only specially designed devices in places in contact with cooking oil, machine oil, detergents, chemicals, etc.
Using other devices may cause heat generation or fire.

9

Avoid installing in places with high level of sulfur gas, ammonia gas, etc.
It can significantly shorten the device life.

3 Usage...

1

Always use products within its ratings.
Not only device performance cannot be maintained outside rating limits, but it can cause malfunction of load equipment, abnormal heat generation or fire.

2

Performance of dust-proof and waterproof devices can be ensured only when used in an appropriate manner, condition, combination, construction and environment. Improper use can cause electric shock or accidents. The "Degree of protection provided by enclosure (IP code)" rating stated on the American Denki website is based on the test method specified in JIS C0920. Please remember that aging and deformation damage degrade the original performance.

3

Do not use products with missing or damaged body or cover.
It may cause electric shock or fire.

4

Insert plugs firmly all the way in, and make sure to fully turn twist locking and clamp locking devices.
Half-plugged or half-turned devices may cause heat generation or fire.

5

Do not use plugs with deformed or damaged blades.
It may cause heat generation or incorrect insertion.

6

Do not use plugs which are very easily inserted or removed or plugs which are loose when inserted in outlets or connector body type products.
It may cause heat generation or fire.

7

Do not insert or remove plugs with wet hands.
It may cause electric shock.

8

Do not leave plugs in inserted state for a long period of time.
Regularly clean and remove dust from the surface of the device between the space and plug blades.
Otherwise tracking may cause smoke or fire.

9

Keep plugs straight when inserting and removing.
Inserting plug diagonally may cause deformation of the blades, resulting in heat generation or fire.

10

Do not apply excessive load or impacts.
It may cause damage.

11

Do not insert or remove plugs when connected equipment is powered because it is dangerous.
Especially when using UL/CSA products (excluding 4320-L15UL, 4322N-L15UL) with direct current, be sure to disconnect power supply at the equipment before removing the plug to prevent arc discharge. It may cause an accident.

12

Keep products out of reach of children.
It may cause electric shock.

4 Maintenance...

1

Vibration, heat cycles, etc. during use may cause terminal screws on wiring devices to become loose earlier than normal.
If possible, regularly inspect and retighten terminal screws once a year.

2

If main body of device or wire feels hot to the touch during use, stop using it immediately. If device must be replaced, always replace both the plug side and receptacle side.

3

Wiring device are expendable goods.
Since their performance may deteriorate from usage and wear, strive to replace them as soon as possible.
Regarding the periodic replacement, it is generally safe to replace them after 10 years.