Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-11-10
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-11-10: Discussion question: 292. Please list the instances of improper installation of instrument enclosures that you have seen
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1. Incorrect selection of the junction box; insufficient capacity. 2. The junction box lid is not secure or is missing. 3. The junction box is not grounded.
1. Incorrect selection of the junction box; insufficient capacity. 2. The junction box lid is not secure or is missing. 3. The junction box is not grounded.
Incorrect selection – too large or too small； Those that need to be grounded are not grounded ； The path selected for installation is unreasonable ； The cover is not properly closed, etc.
1. The slot box was selected incorrectly, with insufficient capacity. 2. The slot box cover is not secure or is missing. 3. The trough box is not grounded. 4. When the length of steel or plastic trough boxes in straight sections exceeds 30 meters, and the length of trough boxes made of aluminum alloy or fiberglass-reinforced plastic exceeds 15 meters, expansion joints are not provided. 5. No compensation device was installed where the trough box crosses the deformation joint.
Incorrect selection – too large or too small； Those that need to be grounded are not grounded ； The path selected for installation is unreasonable ； The cover is not properly closed, etc.
1. The slot box was selected incorrectly, with insufficient capacity. 2. The slot box cover is not secure or is missing. 3. The trough box is not grounded. 4. When the length of steel or plastic trough boxes in straight sections exceeds 30 meters, and the length of trough boxes made of aluminum alloy or fiberglass-reinforced plastic exceeds 15 meters, expansion joints are not provided. 5. No compensation device was installed where the trough box crosses the deformation joint.
1. Incorrect selection of the junction box; insufficient capacity. 2. The junction box lid is not secure or is missing. 3. The junction box is not grounded. 4. No jumper cable