Question 1

What is the difference between LSF and LSOH?

Accepted Answer

LSF (Low Smoke and Fume) cables are made from a modified version of PVC and can emit large amounts of black smoke and hydrogen chloride gas when burned. On the other hand, LSOH (Low Smoke Zero Halogen) cables emit no more than 0.5% hydrogen chloride and burn cleanly compared to LSF cables.

Question 2

What is the difference between LSOH and LSZH?

Accepted Answer

LSOH stands for Low Smoke Zero Halogen, while LSZH stands for Low Smoke Zero Halogen as well. They are essentially the same, and the terms are used interchangeably. Both types of cables are designed to produce minimal smoke and toxic fumes when exposed to fire.

Question 3

What is the difference between PVC and LSOH?

Accepted Answer

PVC (Polyvinyl Chloride) is a type of plastic used in many cables. LSF cables, which are a modified version of PVC, can produce large amounts of black smoke and hydrogen chloride when burned. LSOH cables, on the other hand, emit no more than 0.5% hydrogen chloride when exposed to fire and burn more cleanly than PVC-based cables.

Question 4

What is the difference between CAT6 PVC and LSOH?

Accepted Answer

CAT6 PVC cables are made using Polyvinyl Chloride as the insulating material. CAT6 LSOH cables use Low Smoke Zero Halogen material as the insulator. The primary difference lies in their reaction to fire: LSOH cables produce minimal smoke and toxic fumes, while PVC cables can produce more smoke and toxic fumes.

Question 5

What is the difference between LSF and PVC?

Accepted Answer

LSF cables are made from a modified version of PVC. While both are related, LSF cables are specifically designed to produce less smoke and fumes than regular PVC. However, they can still emit significant amounts of black smoke and hydrogen chloride gas when burned.

Question 6

What are the disadvantages of LSF cable?

Accepted Answer

LSF cables can give off large amounts of black smoke and hydrogen chloride gas when burned. Black smoke can obscure exit routes during a fire, making evacuation more challenging. Hydrogen chloride gas can be harmful to both people and sensitive equipment.

Question 7

What is LSOH cable used for?

Accepted Answer

LSOH cables are used in environments where safety is a priority, especially in areas with a high density of people or sensitive equipment. Their low smoke and minimal toxic fume emissions when exposed to fire make them suitable for places like hospitals, schools, public buildings, and data centres.

Question 8

Is LSZH better than PVC?

Accepted Answer

In terms of safety during a fire, LSZH (or LSOH) is considered better than PVC. LSZH cables produce minimal smoke and toxic fumes when exposed to fire, whereas PVC cables can emit more smoke and harmful gases like hydrogen chloride.

Question 9

What is an LSF cable?

Accepted Answer

LSF (Low Smoke and Fume) cables are made from a modified version of PVC. When burned, they can emit large amounts of black smoke and hydrogen chloride gas. This black smoke can obscure exit routes during a fire, and hydrogen chloride gas can be harmful to both people and equipment.

Question 10

When should LSF cable be used?

Accepted Answer

LSF cables can be used in various applications, but it's essential to be aware of their properties. They emit significant amounts of black smoke and hydrogen chloride gas when burned. Therefore, they might not be the best choice for environments where safety is a priority, especially in areas with a high density of people or sensitive equipment.

Question 11

What are the disadvantages of LSF cable?

Accepted Answer

The primary disadvantages of LSF cables are:

1. They can give off large amounts of black smoke when burned, which can obscure exit routes during a fire, making evacuation more challenging.
2. They emit hydrogen chloride gas when burned, which can be harmful to both people and sensitive equipment.

Question 12

Where do you have to use Low Smoke cable?

Accepted Answer

Low Smoke (LSOH) cables are used in environments where safety is a priority. Their low smoke and minimal toxic fume emissions when exposed to fire make them suitable for places like hospitals, schools, public buildings, and data centres.

BS6195 Ty.4

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