"Choosing the Filter Lens Shade (Table EP-1)" is lesson 1 of 6 in the Welding (C-60) Learning Hub. It opens with "Why the Shade Number Matters" and works through 5 short steps, then a worked example you can check yourself against.
One-time purchase, no subscription. Law & Business included.
Steps in this lesson
Why the Shade Number Matters
Table EP-1 Is Organized by Process and Size
Gas Welding and Cutting Use Metal Thickness
Read the Table as a Guide, Not a Floor
Protect Everyone Who Can See the Arc
The worked example in the course applies this lesson to a realistic job in 7 steps, starting with "The helper standing in view of the GMAW arc".
What you'll be able to do
Explain the main idea of "Choosing the Filter Lens Shade (Table EP-1)" in plain language you can use on the exam.
Apply this step with confidence: "Gas Welding and Cutting Use Metal Thickness".
Apply this step with confidence: "Read the Table as a Guide, Not a Floor".
Apply this step with confidence: "Protect Everyone Who Can See the Arc".
Test yourself on the worked example and the quick-check quiz inside the classroom.
The diagram for this lesson, exactly as it appears in the Learning Hub.
The first steps of this lesson
Step 1: Why the Shade Number Matters
Welding arcs give off injurious light rays, and the eye is the first thing at risk. 8 CCR Section 3382(a) requires the employer to provide eye and face protection suitable for the exposure and to make sure employees use it. The federal construction rule says the same thing in plain words: any employee doing any type of welding, cutting, or heating must wear suitable eye protection (29 CFR 1926.353(e)(2)). The shade number of the lens is the setting that decides how much of the arc light gets through.
Step 2: Table EP-1 Is Organized by Process and Size
Section 3382(b) points you to Table EP-1, "Filter Lens Shade Numbers for Protection Against Radiant Energy." For arc welding the table is organized by process and electrode (or wire) diameter: shielded metal-arc (SMAW) with 1/16, 3/32, 1/8, or 5/32-inch electrodes is Shade 10; SMAW with 3/16, 7/32, or 1/4-inch electrodes is Shade 12; 5/16 and 3/8-inch electrodes are Shade 14. Gas-shielded arc welding on nonferrous metal is Shade 11, and on ferrous metal is Shade 12, for 1/16 through 5/32-inch electrodes. The table steps up the shade as the electrode diameter gets larger.
The remaining 3 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.
Independent exam preparation. Contractors Classroom is not affiliated with the Contractors State License Board, and no course can guarantee a passing result.
