How many meters of LED wall washer can one main line carry?
In the installation of LED wall washer, customers often ask how many meters of wall washer a main line can carry. Today, Xiaobian will explain this problem to you.
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The factors that affect the number of wall washers installed are as follows:
1. The diameter and material of the main wire carry different currents;
The calculation method of the safe current carrying capacity of copper wire is:
The safe current carrying capacity of 2.5 square millimeter copper power cord -- 28A.
The safe current carrying capacity of 4 square millimeter copper power cord - 32A.
The safe current carrying capacity of 6 square mm copper power cord - 48A.
The safe current carrying capacity of 10 square millimeter copper power cord -- 65A.
The safe current carrying capacity of 16 square mm copper power cord - 91A.
The safe current carrying capacity of 25 square millimeter copper power cord - 120A.
If it is an aluminum wire, the wire diameter should be 1.5-2 times that of the copper wire. If the copper wire current is less than 28A, it is definitely safe to take 10A per square millimeter. If the copper wire current is greater than 120A, take it as 5A per square millimeter.
2. The number of switching power supplies (transformers) used in different lights is different;
The power of LED wall washers commonly used on the building ranges from 12W-72W, and the amount of power supply is determined by the number of lights.
3. What is the rated power of the switching power supply (transformer);
The power of the rain-proof switching power supply commonly used in the market is about 350W-400W. These two powers are relatively safe ranges recognized by the industry. In addition, the recommended load power of the rain-proof power supply with good quality is ≥80%. We are calculating the power of the power supply. You need to pay attention to this when using the dosage.
Take 24W wall washer as an example:
Before calculating how many meters of LED wall washers a main line can carry, we need to confirm the above three information, for example:
Main wire: 4m2 copper wire
light power: 24WDC24V
Power supply: 400W
Calculation:
The number of wall washers with one power supply: 400×80%÷24=13(meters)
One main line load power: 32A×24V=768W (power)
Matching quantity of power supply: 768W÷(400×80%): ≈2(sets).
2 × 13 meters = 26 meters (generally speaking, for the sake of stability, it is recommended to take one or two meters as little as possible after the calculated quantity of each power supply)
According to a simple formula, we can know that 24W wall washer DC24V can be installed 26 meters above the main line of a 4m2 copper wire. Remind users that the actual situation of each project is different. If you encounter problems in the installation of lights and lanterns, you need to explain the specific situation and let the professional installation team or the engineers of the light manufacturer calculate for you.
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