To establish consistency in fiber inspection and achieve more repeatable results for performance across multiple end faces, the IEC developed 61300-3-35, Basic Test and Measurement Procedures for Fiber Optic Interconnecting Devices and Passive Components. The Contractor tasked to perform testing or splicing on any fiber optic cable will follow these testing standards to fulfill their contractual obligations. They define a minimum baseline of quality and workmanshi for installing electrical products and systems. NEIS® are intended to be referenced in contrac documents for electrical construction ation or liability to users of this publication. Existence. That is why relying on International Electrotechnical Commission (IEC) industry standards and innovative inspection equipment is the most reliable way to ensure automatic, consistent, and repeatable certification of fiber cleanliness based on specific acceptance criteria. Every fiber installation. When you build or upgrade a fiber network, the same four words pop up everywhere— fiber optic (bare fiber), pigtail, patch cord, optical cable. They're related, but they are not interchangeable. Mixing them up drives costs higher, increases loss, and slows your rollout.