iPhone iSAPPOS 4, User Manual

Also be sure that attached devices are electrically rated to operate with the power avail -
able in your location.

Use only approved power cable(s). If you have not been provided a power cable for your 
device or for any AC -powered option intended for your device, purchase a power cable 
that is approved for use in your country and is suitable for use with your device. The 
power cable must be rated for the device and for the voltage and current marked on the 
device's electrical ratings label. The voltage and current rating of the cable should be 
greater than the ratings marked on the device. 

To help prevent an electrical shock, plug the device and peripheral power cables into 
properly grounded electrical outlets. These cables are equipped with three-prong plugs 
to help ensure proper grounding. Do not use adapter plugs or remove the grounding 
prong from a cable. If you must use an extension cable, use a 3-wire cable with properly 
grounded plugs.

Observe extension cable and power strip ratings. Ensure that the total ampere rating of 
all products plugged into the extension cable or power strip does not exceed 80 percent 
of the ampere ratings limit for the extension cable or power strip. 

To help protect your device from sudden, transient increases and decreases in electrical 
power, use a surge suppressor, line conditioner, or uninterruptible power supply (UPS).

Do not modify power cables or plugs. Consult a licensed electrician or your power com -
pany for site modi cations. Always follow your local/national wiring rules. 

When connecting or disconnecting power to hot-pluggable power supplies, if offered
with your device, observe the following guidelines.

Install the power supply before connecting the power cable to the power supply.

Unplug the power cable before removing the power supply. 

If the system has multiple sources of power, disconnect power from the device by unplug -
ging all power cables from the power supplies. 

Servicing/Disassembling 

Do not service any product except as expressly set forth in your system documentation.

Opening or removing covers that are marked with the triangular symbol with a lightning 
bolt may expose you to an electrical shock. Only a trained service technician should serv-
ice components inside these compartments.

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