In modern industrial and building electrical systems, AC90 cables are widely used for their durability and high performance. However, many engineers and electricians often overlook a critical step during installation-grounding the metal armor layer. Proper grounding not only ensures electrical safety, preventing shocks and short circuits, but also effectively reduces electromagnetic interference (EMI) and improves signal transmission stability.
If you're looking for methods to ground the metal armor layer of AC90 cable, this article provides a detailed guide along with common issues and solutions.
Overview of AC90 Cable and Metal Armor
AC90 cables consist of multiple layers: conductor, insulation, metal armor, and outer sheath. Among these, the metal armor layer serves not only as mechanical protection but also as a shielding layer to prevent external electromagnetic interference.
Functions of the metal armor layer:
- Electrical Shielding: Reduces interference and ensures stable power or signal transmission
- Mechanical Protection: Prevents physical damage to internal conductors
- Grounding: Ensures system safety and protects against leakage or lightning hazards
Why Ground the Metal Armor Layer of AC90 Cable?
- Ensure Safety
Grounding prevents electrical shock, especially in humid or high-risk environments, safeguarding personnel and equipment.
- Improve Electrical Performance
Proper grounding significantly reduces electromagnetic interference (EMI), ensuring stable power and signal transmission.
- Compliance with Standards
International standards such as IEC and NEC require the metal armor layer to be properly grounded to ensure overall electrical system safety.
How to Ground the Metal Armor Layer of AC90 Cable
Common Grounding Methods
- Direct Grounding: Securely connect the armor layer to the grounding terminal
- Grounding Clamps or Straps: Used to connect the metal armor to the ground wire, ensuring conductivity
Grounding Steps
- Prepare grounding wire, clamps, and tools
- Clean the metal armor surface to remove oxidation
- Firmly attach the grounding wire to the armor layer
- Measure the grounding resistance to ensure it meets standards
Precautions
- Select the proper gauge for the grounding wire
- Avoid interference with other cables
- Regularly inspect the grounding to ensure long-term effectiveness
Common Reasons for AC90 Cable Armor Grounding Failure
- Poor contact or oxidation of the grounding wire
- Grounding wire gauge too small, causing high resistance
- Corrosion due to humid installation environments
- Lack of regular inspection and maintenance
Why Choose Us
Properly grounding the metal armor layer of AC90 cable is not only crucial for safety but also essential for maintaining electrical system performance and stability. Regardless of project size, regular inspection and proper installation are key.
At Dongguan Greater Wire & Cable Co., Ltd., we have extensive experience and comprehensive technical solutions for AC90 cables. We offer a full range of AC90 cables and grounding support services. Whether it's a small project or a large-scale installation, our professional pre-sales and after-sales teams are ready to solve any issue, ensuring safe installation and reliable cable performance.
📞 Contact us for consultation and purchasing:
- Tel/WhatsApp/Wechat: +86 135 1078 4550 / +86 136 6257 9592
- Email: manager01@greaterwire.com
Enhance safety and performance by properly grounding the metal armor layer of AC90 cables. Contact us today for professional solutions and high-quality products!