Class 3724
Code 3724 applies to contractors specializing in the erection or repair of heavy machinery or equipment at their customers’ locations, which may include plants, factories, and mills. This classification also applies to contractors specializing in the installation or repair of electrical apparatus at their customers’ locations. The term “electrical apparatus” means electrical power equipment such as, but not limited to, heavy motors, generators, converters, transformers, compressors, and power switchboard equipment.
Code 3724 also applies to the installation of substation equipment in addition to central station equipment; however, it does not apply to erecting poles, stringing wires, installing transformers on poles or on the outside of buildings, or making service connections. While the operations vary depending on the type of job, there is a considerable amount of heavy lifting, frequently by the use of hoists or cranes.
The installation of overhead (garage) doors is assigned to this classification when this work is performed by specialty contractors. If these doors are installed by the builder of an entire residence, the appropriate carpentry code is assigned.
Refer to Code 5538 for duct work and other related sheet metal work associated with non-portable air conditioning equipment installation, service or repair. Code 3724 applies to the installation or repair of compressors, motors or other machinery of commercial refrigeration and non-portable air conditioning systems.
Refer to Code 9519 for the service or repair of residential central vacuum cleaner units. The installation of residential central vacuum systems is assigned to Code 5183.
Additional operations included in this code are the installation of acetylene gas machines, conveyor systems, gas benches and retorts, grates in steam boilers, leather beltings, gas station tanks, and automatic car washing equipment and the erection of temporary floodlights.
The installation of solar panels, whether ground-supported or installed on roofs, is assigned to Code 5538 and specifically includes all plumbing and electrical work. Site work, concrete pad construction, and supporting metal framework installation in conjunction with ground-supported solar panel installation are to be separately rated. Separately rate all roof repair in conjunction with qualifying Code 5538 solar panel roof installation to the appropriate roofing classification codes.
Commercial oil or gas burner installations or pump installations are assigned to Code 3724, while similar operations of a domestic nature are assigned to Code 5183.
Water tower erection is assigned to either Code 3724 or Code 5040. The erection of water towers that consist primarily of iron or steel is assigned to Code 5040. The erection of water towers that consist primarily of other materials is assigned to Code 3724. It is the general practice to erect these towers from prefabricated parts and sections which are delivered to the job location. The framework is assembled by bolting sections together, and the necessary pipes, fans, motors, or other parts are installed.
The installation of platform or beam-type scales is assigned to Code 3724. Assign coin-operated scale installation to Code 5192. Assign counter-type scale installation to Code 5191.
Code 3724 applies to contractors who perform satellite dish installation with division of payroll permitted for pouring concrete pads (Code 5213) and ancillary wiring inside buildings (Code 5190). Code 3724 includes installation of large satellite dishes on the ground or on roofs. Small satellite dishes (36 inches or less) mounted on buildings are assigned to Code 9519. Refer to Code 7600 when installed by a telecommunications employer.
Code 3724 includes installation or repair of truck trailer refrigeration systems when this work is performed away from the premises of the repairer or installer. Assign Code 8380 to these operations when the installation or repair work is performed at the employer’s shop. Code 3179 only applies to those shops that exclusively repair truck trailer refrigeration systems that have been removed from the trailers by others.
Code 3724 is not available for any of the operations noted in this scope when these operations are performed by an insured’s employee on equipment belonging to the insured. MA Manual Rule IV-B-3. indicates that maintenance or repair of an employer’s equipment by an employer’s employee is a general inclusion.
The installation, service or repair of commercial appliances such as dishwashers, electric ovens, food mixers and fry kettles is assigned to Code 3724, not Code 9519.
Refer to Code 3726 for specialist contractors that perform erection or repair of oil stills.
Class 3724
Code 3724 shall not be assigned to employees of insureds engaged in the installation or repair of electrical apparatus on the premises of the insured. Such payroll must be included in the governing classification. Erection of poles, stringing of wires, installation of service transformers on poles or on the outside of buildings or the making of service connections to be separately rated as Code 7538 electric light or power line construction.
Applies to the erection or repair of machinery or equipment. Code 3724 shall not be assigned to employees of insureds engaged in millwright work on the premises of the insured. Such payroll must be included in the governing classification.