Types of Preventive Clothing and Their Uses or Applications Part-6

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Clean room Suit:
A clean-room suit, clean room suit, or bunny suit, is an overall garment worn in a cleanroom, an environment with a controlled level of contamination. One common type is an all-in-one coverall worn by semiconductor and nanotechnology line production workers, technicians, and process / equipment engineers, as well as people in similar roles creating sterile products for the medical device industry.

The suit covers the wearer to prevent skin and hair being shed into a clean room environment. The suit may be in one piece or consist of several separate garments worn tightly together. The suit incorporates both boots and hood. It must also incorporate a properly fitted bouffant cap or mob cap.

More advanced designs with face covers were introduced in the 1990s (like the Intel fab worker-style suits seen on the Pentium product advertisements).

Suits are usually deposited in a store after being contaminated for dry cleaning, autoclaving and/or repair. Similar suits are worn in the containment areas of nuclear power plants. These suits consist of the main garment, hood, thin cotton gloves, rubber gloves, plastic bags over normal work shoes, and rubber booties. The wrists and ankles are taped down with masking tape. Occasionally a plastic raincoat is also worn. Removal of the garments (into several barrels) is a complicated process which must be performed in an exact sequence. Often a health physicist is present in the work area to observe good anti-contamination practices.
Figure 45: “Technicians wearing clean room suits inspect a semiconductor wafer”
Arc Flash and Shock Hazard Protection Clothing:
Arc Flash:
An arc flash (also called a flashover), which is distinctly different from the arc blast, is part of an arc fault, a type of electrical explosion that results from a low-impedance connection to ground or another voltage phase in an electrical system.
Figure 46: “Arc flash accident – real time scenario”
Figure 47: “Arc Flash and Shock Hazard – real time scenario”
Protection Equipment:
With recent increased awareness of the dangers of arc flash, there have been many companies that offer arc flash personal protective equipment (PPE). The materials are tested for their arc rating. The arc rating is the maximum incident energy resistance demonstrated by a material prior to break open (a hole in the material) or necessary to pass through and cause with 50% probability a second or third degree burn.
Figure 48: “Arc Flash Protective Clothing”
Figure 49: “Arc Flash Protective Clothing”
Racing (Race Car Driver’s) Suit:
NASCAR drivers are required to wear a fire-retardant suit and underwear. This suit serves a dual purpose of identifying the driver outside the car, and protecting them during a fire. The driver also wears fire retardant shoes and gloves. During long races, the heat of the engine might warm the feet to uncomfortable levels, so most drivers wear a heat shield on the bottom of their shoes.

The helmets serve many safety purposes in the NASCAR circuit. First, the helmet protects the driver from injuries. Second, the helmet has hook-ups for radio to communicate with the spotter and crew chief. Third, the helmets sometimes have visors that reduce the sun's glare so the driver can have better vision.
Figure 50: “Jeff Gordon and his crew wearing a fire suit for safety”

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