With impenetrable "armor", can be buried directly into the soil of the cable, have you ever seen? What do you know about direct burial cables and armored cables? These are two very popular types of cables. And do you know the relationship between the two? Today, let's unveil the mysterious veil of direct buried wire and armored wire.
Ⅰ. What is a direct burial wire?
Direct buried wire, which can be buried directly into the trench or use a vibratory plow buried underground photovoltaic cable. Direct burial is different from the pipe, trench tunnel these laying methods, direct burial cable the laying without installing pipes. A directly buried cable structure is an additional steel belt or steel wire armored fiber optic cable, with resistance to external mechanical damage and soil erosion performance.
Ⅱ. What is armored cable?
Armored cable, also known as PVC insulated PVC sheathed steel armored power cables, simply put, it is in a photovoltaic cable with a layer of metal protection on the outside, to avoid the internal utility layer in the transportation and installation damage. Armored cable construction is armored plus a layer of insulation sheath, armored materials include steel tape, steel wire, copper tape, tinned steel wire, etc., their selection is mainly based on the customer's use of the environment and the requirements to choose.
1. Pros of direct buried wire
A. Saving the cost of outdoor electrical works
The biggest advantage of direct buried wire is that there is no need to install the piping system and it is easy to lay, thus saving the cost of material and labor.By bypassing conduit or pipe, direct burial cables also eliminate the limitations imposed by these structures. Direct burial wire reduces inflexibility in line routing and siting, making electrical design more efficient and adaptable.
C. Minimizing the threat of accidental contact
Direct burial wire minimizes the threat of accidental contact with the electrical elements, thereby increasing safety. With no external conduit or pipe, there are fewer exposed cables or hidden contact points. This reduces the chance of electric shock or electrocution, making direct burial lines a safer choice for outdoor electrical installations and widely used.SUNKEAN Armored Cable TÜV 2PfG/2642 1500V DC Aluminum Core Direct Burial Wire is insulated and sheathed with cross-linked polyethylene compound (XLPO) and is suitable for a variety of harsh outdoor environments. It belongs to the category of direct buried cables that can be armored to protect against mechanical damage and rodent bites, and at the same time can be used without being sheathed in conduits. If you want to buy this product, please contact wendy@ske-tech.com.
2. Cons of direct buried wire
A. Inconvenient maintenanceThe direct buried wire is buried deep in the soil, not as good as pipe cables to dig. If you want to maintain, you need to dig up the overburden, and it is only recommended to be used in places where maintenance is not a concern, or where this type of maintenance is acceptable. Direct burial is generally required to be padded with yellow sand. At the same time direct buried cable can not be laid to the same as the cable through the pipe, you can’t add some spare pipe, for future line maintenance and capacity increase, etc., to prepare.
B. Limited protection against physical stresses and shocks
The direct buried wire must also be protected from being crushed, and it is common practice to lay armored cables in a bed of sand so that stones do not press into the outer sheath of the cable. However, due to the different pressure conditions of outdoor electrical systems, bare direct buried cables in environments such as highways also need to be protected from crushing by installing conduits.
1. Prons of armored cables
A. Increased protection against physical damage and shockAt the same time, the armor layer can be grounded, playing a role in protecting the cable.
B. Moisture-proof, corrosion-proof, anti-environmental factors
An armored cable mechanical protection layer can be added to any structure of the cable to increase the mechanical strength of the cable and improve its anti-erosion ability. Be able to prevent rats from biting, not to make rats bite the cable through the armor resulting in power transmission problems. Also because the protective layer is hard, the material is waterproof and has the function of moisture and corrosion resistance.
V. How to choose direct burial wire or armored cable safely?
1. Does direct buried need to be Armoured?
Yes, direct buried generally uses armored cable. In the armored cable metal sheath ends to be reliable grounding, grounding resistance shall not be greater than 10 Ω.The directly buried wire is generally compared with the pipeline cable, and the armored cable is generally compared with the non-armored cable and is classified by two different aspects of the cable. Direct burial cable is generally compared with the pipeline cable, and the armored cable is generally compared with the non-armored cable and is classified by two different aspects of the cable.
3. How to choose direct burial cable or armored wire safely?
Direct burial laying, needs to consider whether the cable is vulnerable to external impacts and leads to damage.C. If the external force is greater, it is necessary to use the protective casing, this in the local (such as through the highway place) set can be.
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