Why is it not advisable to wear synthetic clothes while bursting fire crackers? (i) All synthetic fibres are prepared by using raw materials of petroleum origin. (ii) Synthetic fibres catch fire easily. (iii) On heating, synthetic fibres melt and stick to the body of the person wearing it.

Answer Expert Verified The nylon clothes have the tendency to catch fire very easily and that is why it easily catches fire and therefore one should not wear them while bursting crackers.

Answer : Synthetic fibres such as nylon or polyester are different from the natural fibres. If the clothes made of synthetic fibres catch fire, it can be very dangerous. The fabric will melt and can stick to the body of the person wearing it.

Polyester and nylon melt rather than catch fire, and pull away from the flame. If these materials catch fire, they burn more slowly than cotton and the flame often goes out by itself. If they are combined with other fibres, such as cotton, viscose or wool, then polyester and nylon will burn vigorously.

Most synthetic fabrics, such as nylon, acrylic or polyester resist ignition. However, once ignited, the fabrics melt. This hot, sticky, melted substance causes localized and extremely severe burns.

There’s a dangerous misconception that 100% cotton fabric is flame resistant. The truth is, untreated cotton fabric is not flame resistant (FR) – it will ignite and continue to burn against the skin in the event of an arc flash.

Among some of the most recognized brands and types of fire resistant fabrics are nomex flight suits, kevlar, nomex, indura, pbi, proban, and a few other notable names.

Refractories are hard, heat-resistant materials such as cement, bricks, precast shapes, ceramics and fire clay. Some of the minerals used to make refractories include alumina, chromite, fire clays, magnesite and silicon carbide.

In contrast, a fire resistant material is one that doesn’t burn easily. One example of this is the artificial stone used in kitchen countertops, like the DuPont brand Corian. The plastic of a Corian countertop is filled with finely ground rocks made of hydrated aluminum oxide, a chemical compound that doesn’t burn.

Various building materials are fire-resistant, but some of the best ones are fire-resistant glass windows, concrete, gypsum, stucco and brick.

Take a look at some of the most common options for fireproof insulation in Sacramento, CA: Fiberglass: Made of glass that is spun into fibers, then combined with plastic polymers, fiberglass insulation is naturally fire resistant.

Fiberglass Melting Can Cause Problems Although fiberglass insulation cannot burn, if it reaches a high enough temperature, it can melt. Fiberglass is rated to melt at temperatures above 1,000 degrees Fahrenheit (540 degrees Celsius).

Even though it’s heavily treated with fire-retardant chemicals prior to installation, it is a recognized fire hazard by the Consumer Product Safety Commission (CPSC). Spray foam insulation will ignite at 700°F.

Insulation is installed over NM cables all the time without problems. Conduit would only be needed if the cable were subject to physical damage. So no fire hazard with just romex directly under insulation without a divider of any kind? No.

Romex electrical wire sheathing can last 80 years or longer. The plastic sheathing doesn’t degrade as fast as cloth sheathed wiring. The biggest threats to plastic sheathing are heat and animals such as squirrels and mice. The copper inside the wires can last over 100 years.

Yes, cables and conduits can run parallel to duct work and can touch each other.

Romex is one popular brand of NM electrical cable. A chief distinction between BX and NM is that BX can achieve grounding through the outer metal casing. This casing needs to be attached to metal boxes. Another distinction is that some types of BX cable can be installed in exposed locations, either indoors or outdoors.

Conduit has one big advantage over ROMEX® wiring and that is flexibility. While ROMEX® is available in a number of sizes, the insulated wires are all white, black and red. With conduit, you can pull two yellow wires from a switch to a light fixture. Because both are considered “hot,” no white wire is needed.

I’m planning to rewire, and have already bought the MC cable for the job… It’ll be a lot more work, but the result will be much safer than romex. Keep in mind that millions of homes are wired in NM cable and do just fine.