What feature provides EMI shielding in LiYCY cable?

What feature provides EMI shielding in LiYCY cable?

• A. Aluminum foil
• B. No shield
• C. LiYCY
• D. Copper braided shield/screen

Answer: (D)

EMI shielding comes from surrounding the conductors with a conducting layer that intercepts external fields and routes the interference to ground. In LiYCY cables, a copper braided shield wraps around the conductors. This braided shield provides a continuous, flexible metal barrier with low impedance, effectively attenuating a wide range of frequencies and preventing noise from entering or leaving the cable. Grounding the shield helps drain away interference and keep the inner conductors clean. While aluminum foil can also provide shielding in some designs, the copper braid offers better coverage around bends and multiple conductors. The LiYCY designation refers to the insulation/jacket, not the shield, and a cable with no shield would lack EMI protection.

EMI shielding comes from surrounding the conductors with a conducting layer that intercepts external fields and routes the interference to ground. In LiYCY cables, a copper braided shield wraps around the conductors. This braided shield provides a continuous, flexible metal barrier with low impedance, effectively attenuating a wide range of frequencies and preventing noise from entering or leaving the cable. Grounding the shield helps drain away interference and keep the inner conductors clean. While aluminum foil can also provide shielding in some designs, the copper braid offers better coverage around bends and multiple conductors. The LiYCY designation refers to the insulation/jacket, not the shield, and a cable with no shield would lack EMI protection.