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#### Safety Information

For your protection, observe the following safety precautions when setting up your equipment:

- Follow all cautions and instructions marked on the equipment and described in the documentation shipped with your server.

- Follow all cautions and instructions marked on the equipment and described in the SPARC T4-4 Server Safety and Compliance Guide.

- Ensure that the voltage and frequency of your power source match the voltage and frequency inscribed on the equipment's electrical rating label.

- Follow the ESD safety practices as described in this section.

##### Safety Symbols

Note the meanings of the following symbols that might appear in this document:

| Caution - There is a risk of personal injury or equipment damage. To avoid personal injury and equipment damage, follow the instructions.

| Caution - Hot surface. Avoid contact. Surfaces are hot and might cause personal injury if touched.

| Caution - Hazardous voltages are present. To reduce the risk of electric shock and danger to personal health, follow the instructions.

##### ESD Measures

ESD-sensitive devices, such as the express modules, hard drives, and DIMMs require special handling.

| Caution - Circuit boards and hard drives contain electronic components that are extremely sensitive to static electricity. Ordinary amounts of static electricity from clothing or the work environment can destroy the components located on these boards. Do not touch the components along their connector edges.

| Caution - You must disconnect all power supplies before servicing any of the components that are inside the chassis.

##### Antistatic Wrist Strap Use

Wear an antistatic wrist strap and use an antistatic mat when handling components such as hard drive assemblies, circuit boards, or express modules. When servicing or removing server components, attach an antistatic strap to your wrist and then to a metal area on the chassis. Following this practice equalizes the electrical potentials between you and the server.

##### Antistatic Mat

Place ESD-sensitive components such as motherboards, memory, and other PCBs on an antistatic mat.

##### Related Information

- Removing Power From the Server

- Accessing Internal Components

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