Appraisal Background
Storage-type electric water heaters, that is, the key test items for quality appraisal of electric water heaters include: input power and current, protection against contact with live parts, heat generation, moisture resistance, leakage current and electrical strength, abnormal operation, mechanical strength, structure, power connection and external flexible wires, terminal blocks for external wires, grounding measures, screws and connections, capacity, energy efficiency rating, etc. The main non-conformities relate to power connections and external cords, grounding measures, screws and connections, capacities, energy efficiency ratings.
The quality of unqualified electric water heater products is difficult to guarantee. It not only damages the development of the electric water heater industry and the rights and interests of regular manufacturers, but also directly affects the daily use experience of users and even endangers the personal safety of users.
Zhongke Testing provides accident identification services, which can identify whether there are quality problems related to electric water heaters, issue professional and reliable inspection reports, and assist courts and enterprises in resolving product quality disputes.
Basis for appraisal
GB/T 26185-2010 Instant water heater
QB/T 1239-1991 Instant electric water heater
GB/T 23150-2008 Tubular heater for water heater
GB/T 20289-2006 Storage electric water heater
Authentication case
A new employee of a hotel moved into the staff dormitory. Half a month later, he used the electric water heater provided in the dormitory to take a bath and was electrocuted. Our company was entrusted by the local court to conduct a technical appraisal of the cause of the leakage of the water heater involved in the case. The expert group conducted an on-site environmental investigation and tested the water heater involved and came to the following conclusions:
1. The hotel failed to provide the purchase invoice and purchase, installation, and maintenance status of the electric water heater;
2. The electric water heater shell had serious cracks and leaks. The electric water heater shell, the metal snakeskin tube of the shower head, and the live and neutral wires of the terminals all had spots, and the ground wire of the terminal was disconnected. The
electric water heater has shell cracks and water leakage problems. Short circuits between the live and neutral wires of the output terminals of the electrical box terminal of the electric water heater and the shell can cause the shell of the electric water heater and the metal snake belt of the shower head to become electrified, thus causing an electric shock accident.
