Huawei AR120&AR150&AR160&AR200&AR510
Series Enterprise Routers
Safety and Regulatory Compliance Information
3 Safety Information
Issue 06 (2015-05-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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3.6.2 Safety Guide on Ladder Use
Checking the Ladder
Before using the ladder, first check if the ladder is in good condition. Make sure that you
know the maximum weight that the ladder can support; overweight on the ladder is strictly
prohibited.
Placing the Ladder
Slant angle is suggested to be 75 degrees. The slant can be measured with the angle square or
with arms. When using a ladder, place the wider end of the ladder on the ground. Otherwise,
take protective measures on the base part of the ladder to avoid skidding. Place the ladder on
stable ground.
Climbing the Ladder
When climbing the ladder, note the following.
Ensure the gravity center of your body does not deviate from the ladder edge.
To lessen the danger and ensure the safety, hold your balance on the ladder before any
operation.
Do not climb higher than the fourth highest step of the ladder.
If you are about to climb to the top, the length of the ladder shall be one meter higher
than the eave.
3.7 Mechanical Safety
3.7.1 Drilling
Drilling on the rack without permission is strictly prohibited. Drilling that does not satisfy the
requirements concerned may damage the wires and cables inside the rack. If the metal
shavings from the drilling fall into the rack, it may result in short circuit of the circuit boards.
Before drilling a hole on the rack, wear insulation gloves, and remove the cables inside
the rack.
During the drilling, ensure that your eyes are well protected. The hot shavings may
injury to your eyes.
Ensure that the metal shavings do not get into the rack.
Non-standard drilling may damage the electromagnetic shielding performance of the
rack.
After drilling, clean the metal shavings in time.
WARNING
